Question

The remainder when 7^128 is divided by 10 is

Answer 1

Answer:

= 7^128/10

= 1.487816e+107

Answer 2

Answer:

1

Step-by-step explanation:

When 7^n is divided by a number then the last digit of that number will be

   7  if n=4k+1

   9 if n=4k+2

   3  if n=4k+3

   1   if n=4k

As 128=4k

   Implies the unit digit is 1.

THEREFORE THE REMAINDER WHEN 7^128 IS DIVIDED BY 10 THE remainder is1.