Number Theory
# Greatest Common Divisor / Lowest Common Multiple

When 2017 is divided by a 2-digit number, what is the largest possible remainder?

**Bonus:** Generalize this problem.

Find the sum of all integers $k$ with $1\leq k\leq 2015$ and $\gcd(k,2015)=1$.

×

Problem Loading...

Note Loading...

Set Loading...