Question

List all the numbers between 3400 and 3500 that are divisible by 10,5, and 2. Explain your thinking

Answer 1

The numbers are 3400, 3410, 3420, 3430, 3440, 3450, 3460, 3470, 3480, 3490, and 3500.

My reasoning is that if a number is divisible by 10, it will also be divisible by both 5 and 2 because 10 is divisible by 5 and 2. It cannot be any other number other than the ones listed above because any other number is not divisible by 10.

Answer 2

3410,3420,3420,3440,3450,3460,3470,3480,3490. Because all of those are divisible by 10 and 10 is divisible by both 2 and 5. But there can't be more numbers because 10 can't go a number divisible only 5(3405 for example)into a number divisible by only 2(3402) for the numbers listed.