Short cut Trick to find the square of number between 20 & 30.
Short cut Trick to find the square of number between 20 & 30.
Short cut Trick to find the square of number between 20 & 30.
Eg: 232 = (20 + 3)2
= 202
+ (40 x 3) + 32
= 400 +
120 + 9
= 529
Eg: 292 = (20 + 9)2
= 202
+ (40 x 9) + 92
= 400 + 360
+ 81
= 841
Eg: 272 = (20 + 7)2
= 202
+ (40 x 7) + 72
= 400 + 280
+ 49
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