How to remember the square from 1 to 75?

First of all, just memorize the square from 1 to 25 which is not the tough task.
Now let me explain step by step.
→Always compare with 25
→for an example if you want to know the square of 29.
→subtract 29 from 25 you will get 4 (multiply this remainder with 100 always, keep this calculation in mind i.e. 400)
→now subtract 4 from 25 you will get 21
→square of 21 is 441 and add that 400, you will get 841
Now another example:
Square of 31
(31-25) = 6*100 = 600(keep this in my with fraction of second)
(25-6) = 19^2=361 add this to remainder 600+361=961
1 1
2 4
3 9
4 16
5 25
6 36
7 49
8 64
9 81
10 100
11 121
12 144
13 169
14 196
15 225
16 256
17 289
18 324
19 361
20 400
21 441
22 484
23 529
24 576
25 625
Just practicing one or two times, you will not take more than 2 second to calculate the same.
Hope you will like it as this is my own innovation. and i am sure too that you will not get this even on in coaching center.
Same applies to 51 to 75. Static number will be 75 in place of 25. then on and on.

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