## anonymous 3 years ago Find the number of pairs of coprime integers (n,m) such that 1≤n≤m≤20. Details and assumptions 2 integers are coprime if their greatest common divisor is 1.

1. anonymous

Again a question from BRILLIANT...

2. anonymous

yaaaaa!!

3. ParthKohli

@shubhamsrg LOL

4. ParthKohli

$\phi(1) + \phi(2) \cdots \phi(20) = 2^{7}$

5. ParthKohli

What level are you on?