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

Without experience that would help you recognize it right away, I thinkyou 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