Find the number of digits in the square root of each of the following numbers (without any calculation): (i) 64 (ii) 144 (iii) 4489 (iv) 27225 (v) 390625

(i) Here, 64 contains two digits which is even.
Therefore, number of digits in square root = n/2 = 2/2 = 1
(ii) Here, 144 contains three digits which is odd.
Therefore, number of digits in square root = n+1/2 = 3+1/2 = 4/2 = 2
(iii) Here, 4489 contains four digits which is even.
Therefore, number of digits in square root = n/2=4/2=2
(v) Here, 390625 contains six digits which is even.
Therefore, number of digits in square root = n/2=6/2=3

Class 8 Maths Chapter 6 Exercise 6.4 Solution in Video

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