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1. Which of the followng numbers is divisible by 3?
- A. 177
- B. 177
- C. 177
- D. 177
Answer: Option A
Explanation:
To check if a number is divisible by 3, you can sum its digits. If the sum is divisible by 3, then the original number is also divisible by 3.
Let's apply this rule to the numbers given:
For 177: 1 + 7 + 7 = 15. Since 15 is divisible by 3, 177 is divisible by 3.
For 200: 2 + 0 + 0 = 2. Since 2 is not divisible by 3, 200 is not divisible by 3.
For 331: 3 + 3 + 1 = 7. Since 7 is not divisible by 3, 331 is not divisible by 3.
For 457: 4 + 5 + 7 = 16. Since 16 is not divisible by 3, 457 is not divisible by 3.
So, the number 177 is divisible by 3, while the others are not.
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