Question

find the unit digit in (2135774)^647​

Answer 1

Answer:4

Step-by-step explanation:

Last digit of the given number is 4

4^1=4

4^2=16

4^3=64

4^4=256

So we can see that the last digit will be 4 for odd powers and 6 for even powers. Here 647 is odd number and hence the unit digit will be 4