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### Questions (14)

 9 Given 5 children and 8 adults, how many ways can they be seated so that there are no two children sitting next to each other. [duplicate] 3 If $p - 1 = 2q$, and $5$ is a primitive root $\bmod q$, then $5$ is a primitive root $\bmod p$ 2 Consider the set of all $n\times n$ matrices, how many of them are invertible modulo $p$. [duplicate] 2 chi-square test for uniform distribution 2 Proof that $(a)^n \bmod n^2 = (a \bmod n)^n \bmod n^2$

### Reputation (330)

 +5 Consider the set of all $n\times n$ matrices, how many of them are invertible modulo $p$. +10 What is an efficient nesting of mathematical theorems? +5 chi-square test for uniform distribution +10 RSA: How Euler's Theorem is used?

 3 RSA: How Euler's Theorem is used? 1 What is an efficient nesting of mathematical theorems? 1 Name for “decimals” in other bases? -1 How to solve this Diophantine Equation. Step by Step -1 Evaluating $\int 7^{2x+3} dx$

### Tags (21)

 3 cryptography × 4 1 number-systems 3 number-theory × 4 1 terminology 3 group-theory 0 linear-algebra × 5 1 model-theory 0 modular-arithmetic × 4 1 notation 0 abstract-algebra × 2

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 Mathematics 330 rep 310 Cryptography 180 rep 6 Database Administrators 111 rep 3 Stack Overflow 108 rep 4 Writers 101 rep