# 4.3.2. Divisibility

Which of the below completes the following sentence: 4 400 is divisible by

- A10, 5, and 2
- B10 and 5 only
- C2 and 5 only
- D10 only

### Example

Which of the below completes the following sentence: 4 400 is divisible by

- A10, 5, and 2
- B10 and 5 only
- C2 and 5 only
- D10 only

### Solution

Use divisibility rules:

- A whole number is divisible by 2 if its units digit is 0, 2, 4, 6, or 8 (an even number).
- A whole number is divisible by 3 if the sum of its digits is divisible by 3.
- A whole number is divisible by 5 if its units digit is 0 or 5.
- A whole number is divisible by 10 if its units digit is 0.

Therefore,

0

correct

0

incorrect

0

skipped