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Q.

What is the unit's digit of the square of number 29?


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a

1

b

2

c

3

d

4 

answer is A.

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Detailed Solution

The given number is 29.
The unit digit of the given number, 29 = 9.
The square of the unit’s digit number = 81.
The unit digit of the squaring number, 81 = 1.
As a result, the unit digit of the square of 29 is 1.
Therefore, option 1 is correct.
 
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