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Grade: Upto college level

                        

Let me explain this trick by taking examples 67^2 = [6^2][7^2]+20*6*7 = 3649+840 = 4489 similarly 25^2 = [2^2][5^2]+20*2*5 = 425+200 = 625 Take one more example 97^2 = [9^2][7^2]+20*9*7 = 8149+1260 = 9409 Here [] is not an operation, it is only a separation between initial 2 and last 2 digits

6 years ago

Answers : (1)

Sourabh Singh
IIT Patna
askIITians Faculty
2104 Points
							
Hii
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4 years ago
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