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Q.

What is the value of the unit’s place in square of 87?


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a

3

b

9

c

8

d

6 

answer is B.

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Detailed Solution

The given number = 87.
It is required to find the unit’s place in square of 87.
The unit digit of the given number = 7.
Now square the unit’s digit number,
⇒ 7 2 =7×7=49  
Here, the value of the units placed in a square of 87 equals 9.
Therefore, option 2 is correct.
 
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