Question

If the number 20x is divisible by 5, which values can x take?

Options

• 1 or 5

• 0 or 5

• 2 or 0

• 5 or 9

Answer 1

0 or 5

Explanation:

Since x is in the unit's place, the rule requires it to be 0 or 5 for the number to be divisible by 5.