Question

Without actually multiplication, find the square of 75 containing 5​

Answer 1

Answer:

(75)^2 = 5625 which contains 5.

Step-by-step explanation:

Use this trick for any no. which ends with 5 to find.out it's square.

write down the square of 5 i.e 25

then no.s which are left in your left hand side of 5 i.e 7 in 75, multiply 7 with its successive no. i.e 8. 7*8 = 56.

So here we get 56 from 7*8 and 25 from 5.

then we simply write like this 5625 = (75)^2