Question

if there are 30 students in a class and 39 candys in a pack how many packs of candy do you have to buy so that there will be no left overs (hint us lowest common mutilple

Answer 1

Yes, what is the lowest common multiple (LCM) of 30 and 39?

30=2*3*5
39=3*13
The LCM is the product of the highest power of each of the prime factors, namely
LCM=2*3*5*13=390
No. of packs required = 390/39=10