What is the smallest number greater than 100 that is:

a) divisible by two?

b) divisible by ten?

c) divisible by four?

The smallest number greater than 100 is divisible by ten

I'd start by listing out the multiplies of all three past 100, like this:

102, 104, 106, 108, 110, 112, 114, 116, 118, 120, 122, 124, 126, 128, 130

104, 108, 112, 116, 120, 124, 128, 132, 136

110, 120, 130, 140

Now it's just a matter of finding the number that is the same for all three of them, which is 120.