Question

36. A number has 7 in its unit place. What digit will be there at the units place if that number is multiplied by itself? a)9 b. 7 C. A d.6​

Answer 1

Number in the unit place = 7

Multiplied by itself = 7×7

= 49

So,

49

= 40 + 9

Since the answer is a) 9