Question

The square of 39,00,000 ends with ______ number of zeroes.

• A. 5
• B. 10
• C. 14
• D. 25

Answer 1

The correct option is B 10

If the number of zeros at the end of the number is $n$ then the number of zeros at the end of square of that number will be $2n$.
In the given number 39,00,000, there are 5 zeros.
Therefore, the number of zeros at the end of square of 39,00,000 will be $2\times 5=10$.