Multiple choice

If a perfect square has 'n' digits in it, then the square root of that number will have how many digits in it?

  1. 2n digits

  2. 2n - 1 digits

  3. n/2 digits

  4. (n + 1)/2 digits

  5. n/2 digits if 'n' is even or (n + 1)/2 digits if 'n' is odd
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Square root(2809) = 53 2809 has 4 digits in it and its square root 53 has only 2 digits in it.  As per this option, number of digits should be 4/2 = 2, which is correct.

Square root(27225) = 165 27225 has 5 digits in it and its square root 165 has only 3 digits in it. As per this option, number of digits should be (5+1)/2 = 3, which is correct. This option is correct.

Keep practicing — related questions