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Question

What are the number which cannot come to the unit place of perfect square?

A
2
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B
3
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C
7
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D
8
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Solution

The correct options are
A 3
B 7
C 8
D 2
Perfect square Unit place digit
12=1
22=4
32=9
42=16
52=25
62=36
72=14
82=64
92=81
102=100

We can see number which can comes to unit place of perfect squares are 1,4,5,6,9 and 0.

The numbers which can not come to the unit place of perfect square are 2,3,7 and 8.

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