Find the unit's digit of (187)^124?
Answers
Answer:
I THINCK 120
Step-by-step explanation:
0
Step-by-step explanation:
(187)^124
first take the last digit here it is 7,
u should know the cyclicity, cyclicity of 7 is 4
and therefore 124/4 ==> remainder ==>0
if the remainder is 0 and the last digit is 3,7,9 then the unit digit is 0.
Hence the unit digit is 0.
Cyclicity
2 4
3 4
4 2
5 1
6 1
7 4
8 4
9 2