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Q: Which of the following numbers is divisible by 12?
  • A. 93412
  • B. 63412
  • C. 73412
  • D. 83412
Correct Answer: Option D - The number which is divisible by 12, should be divisible by 3 and 4 also. If the sum of all the digits of a number is divisible by 3, the number will also be divisible by 3. If the last two digit of a number are divisible by 4, the number will also be divisible by 4. From option (d), Then 8+3+4+1+2 = 18, Which is divisible by 3. The last 2-digit of the number are 12, Which is also divisible by 4. Hence, the number 83412 is divisible by 12.
D. The number which is divisible by 12, should be divisible by 3 and 4 also. If the sum of all the digits of a number is divisible by 3, the number will also be divisible by 3. If the last two digit of a number are divisible by 4, the number will also be divisible by 4. From option (d), Then 8+3+4+1+2 = 18, Which is divisible by 3. The last 2-digit of the number are 12, Which is also divisible by 4. Hence, the number 83412 is divisible by 12.

Explanations:

The number which is divisible by 12, should be divisible by 3 and 4 also. If the sum of all the digits of a number is divisible by 3, the number will also be divisible by 3. If the last two digit of a number are divisible by 4, the number will also be divisible by 4. From option (d), Then 8+3+4+1+2 = 18, Which is divisible by 3. The last 2-digit of the number are 12, Which is also divisible by 4. Hence, the number 83412 is divisible by 12.