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Grade: 12th Pass

                        

Find the square of a no. with its last digits 5? 1. Choose a no. with last digits 5 say 1225. 2.multiply the no. excluding 5(i.e. 122 in this case)by no.+1 (i.e. 123 here) so 122x123=15006. 3.write multiplied answer and write 25 nxt to it (1500625). Here you go.. this is ur answer..!!!!!

6 years ago

Answers : (1)

Sumit Majumdar
IIT Delhi
askIITians Faculty
137 Points
							Dear student,
You are correct. Let me discuss another one.
a) Let the number be 175.
b) Now if we exclude 5, we get: 17. So we need to multiply this with 18. Hence, we get: 17\times18=306.
c) Thus the required square is equal to: 30625.
Regards

6 years ago
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