ASSIGNMENT 2
FEB 5, 2021
You have until Feb 12, 11:59pm to upload your scanned solutions to crowdmark.
Answers without explanation may get 0 marks. You cannot use calculators.
1. Compute ϕ(28), ϕ(107), ϕ(56) where ϕ is the Euler’s totient function.
2. Find the last (right) two digits of 777 .
3. Suppose that n is an odd number. Prove that n2 is congruent to 1 modulo 8.