Number Quiz

Solution:

Unit digit in (6374)¹⁷⁹³ = Unit digit in (4)¹⁷⁹³  = Unit digit in [(4)¹⁷⁹² x 4]= 4

Unit digit in (625)³¹⁷ = Unit digit in (5)³¹⁷ = 5

Unit digit in (341)⁴⁹¹ = Unit digit in (1)⁴⁹¹ = 1

Required Unit digit of the expression= Unit digit in (4 x 5 x 1) = 10.

Therefore the required unit digit of the expression= 0.

For GATE Preparation join us on Face Book

https://www.facebook.com/gatepreparationforyou