Question -
Answer -
We know that if n is number of digits in a square number then
Number of digits in the square root = n/2 if n is even and (n+1)/2 if n is odd.
(i) 64
Here n = 2 (even)
Number of digits in √64 = 2/2 = 1
(ii) 144
Here n = 3 (odd)
Number of digits in square root =(3+1)/2= 2
(iii) 4489
Here n = 4 (even)
Number of digits in square root = 4/2 = 2
(iv) 27225
Here n = 5 (odd)
Number of digits in square root = (5+1)/2= 3
(iv) 390625
Here n = 6 (even)
Number of digits in square root = 6/2 = 3