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you have to just remember roots of number like 10 20 30 40 50 60. let take an example 2704. now you cant by heart all roots so simple trick is. see where the number 2704 lies. it lies in between 2500 and 3600 i.e the number must be between 50 and 60. now 2nd step look at its units place you will see 4. there are 2 squares which have 4 at units place-----1. squares of number ending with 2 i.e 12*12=144, 2*2=4 and 2. squares of number ending with 8 i e 8*8=64, 18*18=324. so we now know that 2704 must be the square of eitheer 52 or 58 but as you can see 2704 is closer to 2500 than 3600 so the square root of 2704 must be 52. now you may find it difficult at first but it is very fantastic strategy and same strategy can be applied for cubes also
you have to just remember roots of number like 10 20 30 40 50 60. let take an example 2704. now you cant by heart all roots so simple trick is. see where the number 2704 lies. it lies in between 2500 and 3600 i.e the number must be between 50 and 60. now 2nd step look at its units place you will see 4. there are 2 squares which have 4 at units place-----1. squares of number ending with 2 i.e 12*12=144, 2*2=4 and 2. squares of number ending with 8 i e 8*8=64, 18*18=324. so we now know that 2704 must be the square of eitheer 52 or 58 but as you can see 2704 is closer to 2500 than 3600 so the square root of 2704 must be 52. now you may find it difficult at first but it is very fantastic strategy and same strategy can be applied for cubes also
