Number theory

Answer all the questions below and press submit to see how many you got right.

id: 13610

Which integer $n$ with $0\leq n<14$ satisfies $83\cdot 14+5\equiv n \mod{14}?$

id: 14130

What is the sum of the exponents in the prime factorization of 2100?

id: 14138

What is the sum of the exponents in the prime factorization of 210?