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Active Archive
All Topics Algebra Calculus Number Theory Combinatorics Applied Math
Applied Math
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A4 Paper Ratio

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

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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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