# Ex 6.4, 4 (v) - Chapter 6 Class 8 Squares and Square Roots

Last updated at Aug. 31, 2021 by Teachoo

Last updated at Aug. 31, 2021 by Teachoo

Transcript

Ex 6.4, 4 Find the least number which must be subtracted from each of the following numbers so as to get a perfect square. Also find the square root of the perfect square so obtained. (v) 4000 Finding square root of 4000 by long division Here, Remainder = 31 Since remainder is not 0, So, 4000 is not a perfect square Rough 122 × 2 = 244 123 × 3 = 369 124 × 4 = 496 We need to find the least number that must be subtracted from 4000 so as to get a perfect square Thus, we subtract 31 (remainder) from 4000 to get a perfect square. ∴ Perfect square = 4000 − 31 Perfect square = 3969 Also, If we do long division with 3969 We get 63 as square root ∴ Square root of 3969 = 63

Ex 6.4

Ex 6.4, 1 (i)

Ex 6.4, 1 (ii)

Ex 6.4, 1 (iii)

Ex 6.4, 1 (iv)

Ex 6.4, 1 (v)

Ex 6.4, 1 (vi)

Ex 6.4, 1 (vii)

Ex 6.4, 1 (viii)

Ex 6.4, 1 (ix)

Ex 6.4, 1 (x)

Ex 6.4, 1 (xi)

Ex 6.4, 1 (xii)

Ex 6.4, 2 (i)

Ex 6.4, 2 (ii)

Ex 6.4, 2 (iii)

Ex 6.4, 2 (iv)

Ex 6.4, 2 (v)

Ex 6.4, 3 (i)

Ex 6.4, 3 (ii)

Ex 6.4, 3 (iii)

Ex 6.4, 3 (iv)

Ex 6.4, 3 (v)

Ex 6.4, 4 (i) Important

Ex 6.4, 4 (ii)

Ex 6.4, 4 (iii)

Ex 6.4, 4 (iv)

Ex 6.4, 4 (v) You are here

Ex 6.4, 5 (i) Important

Ex 6.4, 5 (ii)

Ex 6.4, 5 (iii)

Ex 6.4, 5 (iv)

Ex 6.4, 5 (v)

Ex 6.4, 6

Ex 6.4, 7 Important

Ex 6.4, 8 Important

Ex 6.4, 9 Important

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Davneet Singh

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 10 years. He provides courses for Maths and Science at Teachoo.