Numbers Q19

19.	Find the remainder when 231 is divided by 5.

	A.	4
	B.	5
	C.	3
	D.	7

Answer – (C)

Solution:

210=1024
Unit digit of 210*210*210 is 4 [as 4*4*4 gives unit digit 4].
=> Unit digit of 231 is 8. Now, 8 when divided by 5, gives 3 as remainder.
Hence, 231 when divided by 5, gives 3 as remainder.