Question

What is the unit digit of the cube of the number 107 (9,3,7,6)​

Answer 1

SOLUTION

TO CHOOSE THE CORRECT OPTION

The unit digit of the cube of the number 107

• 9

• 3

• 7

• 6

EVALUATION

We know that a³ = a × a × a

Now

• If last digit of a number is 0 then last three digit of cube of the number is 000

• If last digit of a number is 1 then unit digit of cube of the number is 1

• If last digit of a number is 2 then unit digit of cube of the number is 8

• If last digit of a number is 3 then unit digit of cube of the number is 7

• If last digit of a number is 4 then unit digit of cube of the number is 4

• If last digit of a number is 5 then unit digit of cube of the number is 5

• If last digit of a number is 6 then unit digit of cube of the number is 6

• If last digit of a number is 7 then unit digit of cube of the number is 3

• If last digit of a number is 8 then unit digit of cube of the number is 2

• If last digit of a number is 9 then unit digit of cube of the number is 9

Here the given number is 107

So the unit digit of the cube of the number 107 is 3

FINAL ANSWER

Hence the correct option is 3

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