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All Topics Algebra Calculus Number Theory Combinatorics Applied Math
Combinatorics
★ ★★★★

Anagram Count

How many distinct permutations exist for the letters in the word 'NABLA'?

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Algebra
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Basic Isolation

Solve for $x$: $$6x = 2^3 \cdot \frac{1}{3}$$

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Algebra
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Binomial Expansion

Expand: $$(a+b)^2$$

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Applied Math
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Compound Interest

An investment of 10,000 USD earns 5% per year for 10 years, compounded once …

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Number Theory
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Cyclic Group Addition

In the modulo arithmetic ring $\mathbb{Z}_{17}$, compute the least non-negative residue of: $$(14 + …

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Combinatorics
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Database Composite Keys

A database table contains 8 distinct columns. How many unique composite primary keys consisting …

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Number Theory
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Divisibility by 9

What is the smallest single-digit positive integer $x$ such that the five-digit number $1234x$ …

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Calculus
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Fundamental Theorem of Calculus

Evaluate the definite integral: $$\int_0^2 3x^2 \, dx$$

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Applied Math
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Kinetic Energy

An athlete with a mass of $70$ kg sprints at a constant velocity of …

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Applied Math
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Linear Elasticity

A synthetic climbing rope stretches by $\Delta x = 0.5$ meters when subjected to …

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Calculus
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Polynomial Differentiation

Compute the first derivative of the function $f(x) = 3x^4 - 2x^2 + 7$ …

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Applied Math
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Portfolio Expected Return

A portfolio consists of two assets. Asset A has a weight of 60% and …

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Number Theory
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Prime Summation

Evaluate the sum of the first five prime numbers in $\mathbb{N}$.

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Algebra
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Rope Skipping Cadence

During a high-intensity interval, you perform $3x$ jumps in the first minute and $x …

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Combinatorics
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Server Rack Arrangement

A system administrator needs to install 5 distinct physical servers into a rack that …

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Applied Math
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Simple-Interest

An investment of 10,000 USD earns 5% per year for 10 years using simple …

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Number Theory
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Small Power Tower

Solve for $x$: $$x = 2^{2^3}$$ Hint: Is $2^{(2^3)}$ the same as $(2^2)^3$?

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Combinatorics
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The Athletic Committee

How many distinct ways can you choose a starting duo from a group of …

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Algebra
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The Symmetric Deadlift

A barbell is loaded for a $70$ kg deadlift. The olympic bar itself has …

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Applied Math
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Velocity Conversion

You travel 36 km in 60 minutes. Calculate average velocity in $m/s$.

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Number Theory
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Base-10 Divisibility

A checksum algorithm generates the base-10 integer $N = 458x2$, where $x$ is a …

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Combinatorics
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Combinatorial Handshakes

In a room of 12 fully connected nodes (or people), how many unique edges …

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Calculus
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Derivative at a Point

Calculate the exact value of the derivative of $f(x) = x^x$ at the point …

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Algebra
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Difference of Squares

Factorize: $$a^2 - 64$$

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Applied Math
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Expected Value

An algorithmic trading strategy has a $40\%$ probability of generating a profit of $1000$ …

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Algebra
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Fraction Simplification

Simplify completely: $$\frac{a^2-b^2}{a+b}$$

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Combinatorics
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Grid Paths

How many ways to move from (0,0) to (2,2) on a grid, only moving …

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Calculus
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Lebesgue Measure of a Region

Determine the exact area of the region bounded between the curves $y = x$ …

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Calculus
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Limit of Product

Calculate: $$\lim_{x \to 0} x \cdot \sin(x)$$

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Algebra
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Logarithmic Base Change

Calculate: $$\log_2(8) + \log_3(27)$$

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Combinatorics
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Network Handshakes

In a decentralized peer-to-peer cluster consisting of 10 nodes, every node must establish a …

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Number Theory
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Orbital Periodicity

Two celestial bodies orbit a star with periods of 12 and 18 local years, …

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Applied Math
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Portfolio Duration

Portfolio A has a duration of 4.5 and a market value of 2,000,000 USD. …

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Applied Math
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Portfolio Variance (Two Assets)

A portfolio consists of two assets. The variances are 0.04 and 0.09. The covariance …

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Number Theory
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Root Identity

Evaluate the expression: $$\frac{2}{\sqrt{2}}$$

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Algebra
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The Alpine Ascent

An alpinist hikes up a $12$ km mountain trail at a velocity of $v$ …

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Calculus
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The Chain-Product Duality

Let $f(x) = e^{2x} \sin(x)$. Evaluate the exact value of the derivative at $x …

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Algebra
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The Golden Polynomial

Determine the exact, strictly positive root of the quadratic equation: $$x^2 - x - …

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Applied Math
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The Water Lily Problem

Water lilies double daily. Full after 100 days. When was it half full?

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Applied Math
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Vertical Projectile

A mass is launched perfectly vertically upwards from the ground with an initial velocity …

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Algebra
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Vieta's Application

Let $r_1$ and $r_2$ be the roots of the polynomial equation $3x^2 - 12x …

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Applied Math
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A4 Paper Ratio

A4 paper keeps ratio when folded in half. If long side is 1, what …

+40 XP
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Calculus
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Asymptotic Convergence

Evaluate the limit analytically (without circular L'Hôpital applications): $$\lim_{x \to 0} \frac{e^x - 1 …

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Calculus
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Catenary Arc Length

Calculate the exact arc length of the curve $f(x) = \cosh(x)$ from $x=0$ to …

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Applied Math
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Continuous Compounding

An initial capital is invested at a continuous compounding interest rate $r$. Provide the …

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Combinatorics
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Dining Philosophers Protocol

6 computational processes are mapped to 6 nodes arranged in a ring topology (circular …

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Algebra
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Exponential Decay Constant

A dynamic system's energy decays according to $E(t) = E_0 e^{-k t}$. If the …

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Combinatorics
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Faulty Grid Navigation

An autonomous agent navigates a discrete 2D grid from $(0,0)$ to $(5,4)$, constrained to …

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Calculus
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Gaussian Integral Prep

Find the exact analytical value for $A$: $$A = \int_0^1 xe^{-x^2} dx$$ Enter numeric …

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Calculus
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Integration by Parts

Evaluate the definite integral representing the first moment of the sine half-wave: $$\int_0^\pi x …

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Algebra
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Logarithm Rule

Simplify into a single logarithmic expression: $$\ln(a) + \ln(b)$$

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Number Theory
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Logarithm of i

Solve for $x$: $$x = \ln(i)$$ Format: i*[fraction]

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Number Theory
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Modular Exponentiation

What is the last digit of $7^{2026}$?

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Applied Math
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Parametric Value at Risk (VaR)

A portfolio has a value of 5,000,000 USD. The daily portfolio volatility is 1.6%. …

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Applied Math
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Put–Call Parity (European Options)

The price of a European call option is 12 USD. The stock price is …

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Applied Math
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Shannon Entropy

A discrete stochastic process produces four possible states with probabilities $P(X) = \{\frac{1}{2}, \frac{1}{4}, …

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Algebra
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Singular Transformation

Given the $2 \times 2$ matrix $A = \begin{pmatrix} x & 2 \\ 3 …

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Number Theory
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The Frobenius Coin Problem

Given two coprime token denominations of 7 and 12, what is the strictly largest …

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Calculus
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The Gaussian Integral

Evaluate the improper integral over the entire real line: $$I = \int_{-\infty}^{\infty} e^{-x^2} dx$$ …

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Applied Math
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Bullet Volume

Find the exact total volume: A cylinder ($r=3, h=6$) capped with a nose defined …

+80 XP
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Combinatorics
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Constrained Subsets

An engineering committee of exactly 4 members must be formed from a pool of …

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Applied Math
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Critical Damping

A mechanical oscillator consists of a mass $m = 5$ kg and a spring …

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Number Theory
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Cryptographic Modular Inverse

In the context of public-key cryptography, find the unique modular multiplicative inverse $x \in …

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Number Theory
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Euler's Identity Application

Calculate the principal real value of $i^i$. Format: e^(-pi/X)

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Number Theory
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Euler's Totient Function

Evaluate $\phi(40)$, which represents the number of integers $k$ in the range $1 \le …

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Calculus
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First-Order Linear ODE

Solve the initial value problem $\frac{dy}{dx} = y$ with $y(0) = 3$. Determine the …

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Calculus
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Infinite Power Tower

What is the value of $x$ for the converging infinite series $y = x^{x^{x^{\dots}}} …

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Algebra
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Nested Square Roots

Evaluate the infinite nested radical: $x = \sqrt{6 + \sqrt{6 + \sqrt{6 + \dots}}}$

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Algebra
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Polynomial Power Roots

How many distinct real solutions exist for: $$(x^2+7x+11)^{(x^2+x-12)}=1$$

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Applied Math
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Relativistic Momentum

A particle with rest mass $m_0$ travels at a velocity of $v = \frac{\sqrt{3}}{2}c$, …

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Combinatorics
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Resource Allocation (Stars and Bars)

A master node must distribute 10 identical computation tasks across 3 distinct worker threads. …

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Algebra
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Roots of Unity

Let $\omega \in \mathbb{C}$ be a complex root of the polynomial $x^3 - 1 …

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Calculus
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Sinc Limit

Calculate: $$\lim_{x \to 0} \frac{\sin(x)}{x}$$

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Calculus
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The Directional Derivative

Let $f(x,y) = x^2 y$. Compute the directional derivative of $f$ at the point …

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Combinatorics
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The Hat Check Problem

A group of 4 mathematicians leave their hats at a checkroom. If the hats …

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Algebra
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Vieta's Theorem

Let $r_1, r_2, r_3$ be the three roots of the cubic polynomial $2x^3 - …

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Calculus
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Arc Length of a Catenary

Determine the exact arc length of the catenary curve $y = \cosh(x)$ spanning from …

+160 XP
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Applied Math
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Brachistochrone Time

A bead slides frictionlessly under gravity $g$ down a cycloid curve defined parametrically by …

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Number Theory
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Complex Cosine

Solve: $$\cos(x) = i$$ Format: [fraction] - i ln([term])

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Calculus
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Complex Residue

Find the residue of $f(z) = \frac{e^z}{(z-1)^2}$ at its pole $z=1$.

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Number Theory
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Complex Sine Solution

Calculate the principal value for: $$\sin(x) = 2$$ Format: X/Y - i*Z

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Combinatorics
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Dyck Path Scheduling

A scheduler processes jobs on a 4x4 grid from $(0,0)$ to $(4,4)$. To maintain …

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Combinatorics
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Expectation of Slope

Find the expectation value of the slope between 2 random points strictly uniformly distributed …

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Calculus
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Feynman's Trick

Evaluate the definite integral analytically: $$\int_0^1 \frac{x^2 - 1}{\ln(x)} dx$$ Format: ln(X)

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Number Theory
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Legendre's Formula

Calculate the exact number of trailing zeros in the decimal representation of $100!$ (100 …

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Applied Math
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Navier-Stokes Poiseuille Flow

In a fully developed, steady laminar pipe flow (Hagen-Poiseuille), the radial velocity profile is …

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Combinatorics
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Random Triangle in Sinc Lobe

What is the expected area of a triangle whose three vertices are uniformly sampled …

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Number Theory
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The Basel Problem

Evaluate the exact sum of the infinite series: $$\sum_{n=1}^{\infty} \frac{1}{n^2}$$ Format: pi^2/X

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Algebra
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The Functional Equation

Determine the explicit function $f(x)$ that satisfies the relation $f(x) + 2f\left(\frac{1}{x}\right) = 3x$ …

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Algebra
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The Spectral Radius

Determine the strictly largest eigenvalue $\lambda$ of the symmetric matrix $M = \begin{pmatrix} 2 …

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Combinatorics
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Total Packet Misrouting

A router dispatches 5 distinct data packets to 5 distinct MAC addresses. Due to …

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Calculus
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Transcendental Maclaurin Expansion

Find the exact rational coefficient of the $x^4$ term in the Maclaurin series expansion …

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Number Theory
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Wilson's Theorem

Determine the least non-negative residue of $16! \pmod{17}$.

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