. "If j is divisible by 12 and 10, is j divisible by 24?Keep in mind that when you say a is divisible by b, it means 'b' is a factor of 'a'.i.e. a = n*bIf b = 12, a can be 12/24/36/48/60.... etcIf j is divisible by 12, it means j has 12 as a factor (so j has at least two 2s and a 3 since 12 = 2*2*3).If j is divisible by 10, it means j has 10 as a factor too (so j has at least one 2 - we already know" . . .