When a number is multiplied by itself the answer has two digits.The digit at tens place is half of the number and digit at ones place is number itself.
What is the number?

Answer: B. 6

To find the answer, you check if each number fits the two rules:
Multiply the number by itself (6 x 6 = 36).
Check the tens place: 3 is exactly half of 6.
Check the ones place: 6 is the number itself.
Since 36 fits both conditions perfectly, 6 is the correct choice.

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