Question

What will be the unit digit of the squares of the given numbers?

799

Answer 1

We know that if a number has its unit’s place digit as a, then its square will end with the unit digit of the multiplication a × a.

799:

Since the given number has its unit’s place digit as 9, its square will end with the unit digit of the multiplication (9 × 9 = 81) i.e., 1