how shall i find the square root of 169 without using calculator?? please describe briefly..

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17-07-2014
Mathematics

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how shall i find the square root of 169 without using calculator?? please describe briefly..

Sagot :

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AL2006 AL2006 · Answer 1 · 2014-07-17T15:59:01-04:00

Without experience that would help you recognize it right away, I think
you would just need to try numbers until you find it.

Pick a number, multiply it by itself with pencil and paper, and see if it works.

(2)² = 4 too small
(3)² = 9 too small, and not growing fast enough; this could take all day
(10)² = 100 still too small
(15)² = 225 oops, too big; go back down
(12)² = 144 too small
(14)² = 196 too big
(13)² = 169 just right; hope the bears don't come back too soon

Sagot :

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