Question

how to find square of a number with 5 at its units place?​

Answer 1

Answer:

• When 5 is at the units place no matter whichever number you take, it' s square will end in 25.
• Suppose the number you want to square is 35

In that case, the square will end in 25.

To get the square' s beginning, multiply the digit in ten' s place with the consecutive number from the number system. That is,

Here 3 should be multiplied with 4.

Hence, the answer is 12.

The square of 35 is 1225.

95 square= (9×10)25 =9025

45^2 = (4×5)25 =2025

15^2 = (1×2)25 =225

n5 squared = (n × {n+1})25