Question

Find the number of digits in the square root of 1771561.

• A. 4
• B. 5
• C. 6
• D. 7

Answer 1

The correct option is A 4

For finding out the number of digits in the square root of a given number we need to place a bar over every pair of digits starting from the digit at one’s place. If the number of digits in it is odd, then the left-most single digit too will have a bar.
So for 1771561 we can the put the bar on the digits as follows: $\overline{1}\overline{77}\overline{15}\overline{61}$
Since, we got 4 bars, the square root will be a four-digit number.