Q329
The unit digit of the expression : 25^6251 \, + 36^528 \, + 73^54 = ?
The unit digit of the expression :
A.
6
B.
5
C.
4
D.
0
AnswerAnswer: Option D
Solution
Answer: Option D
Solution:
256251 = 56251 = 5 (because unit digit of 5 is always 5)36528 = 6528 = 6 (because unit digit of 6 is always 6)
7354 = 354 = 9(unit digit of 354 = 32 ( = 2 remainder) = 9)
now add all the unit digit 5 + 6 + 9 = 20 = 0