Estimate the square root of each of the following numbers by looking at unit digits and the pair of numbers which form the hundreds and thousands place .a)2916 b)3844 c)9025 d)144

Dear student,

a) Unit digit of 2916=6 unit digit of square root = 4 or 6 Discard 16, digit remain is 29.52<29<62So 2916 must be 542 or 562As we know that 562= 3136 so, 2916=54b) Unit digit of 3844 = 4   unit digit of square root = 2 or 8  Discard 44, digit remain is 38. 62< 38 <72  So 3844 must be 622 or 682 As we know that 652= 4225 so, 3844=62
Similarly you can try other parts if having any doubt do get back to us for meaniful help.

Regards

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