Problems based on Numbers Test 5

Question : 28 of 40

Marks: +1, -0

The unit digit of the number

(2,137)^753

is:

Solution:

The unit digit of number

= (2,137)^753

Unit digits

7^1=7

7^2=9

7^3=1

7^4=9

The unit digit number repeats itself after the fourth equation.
So,

(2,137)^{188×4}×(2137)^1=(2137)^1

The unit digit of the number

(2,137)^753

is 7.

Go to Question:

Prev Question

Next Question