Find the unit place digit of the number 6^100\times3^ 110\times7 ^15 .

Number System Practice Test 5

Question : 17 of 40

Marks: +1, -0

Find the unit place digit of the number

6^100×3^ 110×7 ^15 .

Solution:

Unit place digit in

(6)^10=6.

Unit place digit in

(3)^110=3^2=9.

Unit place digit in

6^100×3^10×7^15

So, unit place digit of the number

6^100×3^ 110×7 ^15 =

unit place digit at

(6×9×3)=2.

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