What is the gcf of 45 and 68?

Answer 1

prime factors of 45 are 3,3 and 5 = 3^2, 5^1

prime factors of 68 are 2,2and 17 = 2^2, 17^1

hihest primes are 2^2, 3^2, 5^1 and 17^1

so 2*2*3*3*5*17 = 3060