Question

Which one of the following numbers is divisible by 3?

• A. 4678
• B. 5687
• C. 6988
• D. 6987

Hint:

For divisibility by 3, add digits and check if the sum is divisible by 3.

Answer 1

The Correct Option is D

To determine which number is divisible by 3, we use the divisibility rule for 3, which states that a number is divisible by 3 if the sum of its digits is divisible by 3.

1. Check the number 4678:
   Sum of digits = 4 + 6 + 7 + 8 = 25.
   Since 25 is not divisible by 3, 4678 is not divisible by 3.
2. Check the number 5687:
   Sum of digits = 5 + 6 + 8 + 7 = 26.
   Since 26 is not divisible by 3, 5687 is not divisible by 3.
3. Check the number 6988:
   Sum of digits = 6 + 9 + 8 + 8 = 31.
   Since 31 is not divisible by 3, 6988 is not divisible by 3.
4. Check the number 6987:
   Sum of digits = 6 + 9 + 8 + 7 = 30.
   Since 30 is divisible by 3, 6987 is divisible by 3.

Therefore, the correct option is 6987, as it is the only number that is divisible by 3 based on the divisibility rule.