jordan
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 5 Find the value of $a$, $b$ and $c$ for the given limit. 5 Show $x^2+4x+18\equiv 0\pmod{49}$ has no solution 5 Show $7!^{1/7} < 8!^{1/8}$ 4 How many odd numbers can be formed using the digits $0, 4, 5, 7$? 4 Basic combinatorics question. Select two teams from boys and girls.

### Reputation (1,146)

 +10 Highschool Inequality +10 How many odd numbers can be formed using the digits $0, 4, 5, 7$? +10 When does $2^{n}$ divide $3^{n}-1$ +10 Find the value of $a$, $b$ and $c$ for the given limit.

### Questions (18)

 20 Finding all integer solutions of $5^x+7^y=2^z$ 6 The maximum of $\binom{n}{x+1}-\binom{n}{x}$ 3 Sum of squares of Binom(n,p) values 2 \$a_1<\ldots

### Tags (59)

 22 elementary-number-theory × 19 6 proof-strategy × 4 12 number-theory × 14 4 sequences-and-series × 5 8 real-analysis × 5 4 limits × 3 8 calculus × 5 4 combinatorics × 3 7 divisibility × 3 4 congruences

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 Mathematics 1,146 rep 218 MathOverflow 195 rep 8 Quantitative Finance 101 rep