Permutação e Combinação (nPr, nCr)

Calculate permutations with repetition (n^r) and combinations with repetition (nHr = C(n+r-1,r)) with Exact BigInt results or fast scientific-notation approximations. Includes step logs, teacher mode, and shareable URLs.

Count integer solutions to x1+…+xk=n (xi≥0, xi≥1, or xi≥ai). Includes formulas, short steps, examples, and shareable links.

Compute circular permutations (rotation counted as the same) and necklace/bracelet permutations (rotation + reflection counted as the same) from n. Shows exact values, digit count, formula, short steps, and a shareabl…

Count distinct permutations of strings with repeated characters using multinomial coefficients. Shows BigInt exact results, digit count, scientific notation, steps, random examples (small n), and shareable URLs.

Gere linhas do Triângulo de Pascal, C(n,k) e (ax+by)^n com BigInt. Acompanhe Como é calculado, exporte CSV e compartilhe URLs para aula.

Calculate the birthday paradox collision probability with exact math + a Monte Carlo simulator. Get P(collision), P(no collision), a Poisson approximation with error, and the required sample size n for a target probab…

Embaralhe um baralho e saque ou distribua cartas no navegador. Escolha baralhos e coringas, copie ou baixe resultados. A URL compartilhada é só configurações (sem histórico por padrão).

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