How many integers $m$ are there such that $0<m<100$ and $\gcd(m,100)$ is a single-digit number?

13 answers

2.5 (r-5)
asdf
The Answer is 23
Stop posting AoPS questions. Your cheating!
@above true yea
@3above yup
THIS IS AN AOPS PROBLEM IN ALCUMUS
i have solved the problem,
but am confused about the solution.
can someone pls explain?
thx!
yp it's 88
Agree with above
Noob
STOP POSTING THESE QUESTIONS FROM ALCUMUS!!!!!!!!!!!!!!!!!!!!
88