Question

If the number cba is divisible by 5, what must be true about the digit a?

Options

• a must be an even number

• a must be equal to b

• a must be either 0 or 5

• a is divisible by 10

Answer 1

a must be either 0 or 5

Explanation: 

For the entire number to be divisible by 5, the unit digit "a" must be either 0 or 5.