Question

Prove that for any natural numbes ending in 3,its square ends in 9.

Answer 1

Step-by-step explanation:

Because any natural number with unit digit 3 is multiplied with 3 the unit digit in the result should be 9

For ex- 13*13=169

here in both the numbers the unit digit is 3

here in both the numbers the unit digit is 3therefore the unit digit in answer should be 9