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Random Interesting Patterns Followed by Square Numbers

Which of the ...

Question

Which of the following correctly represents the units digit of any perfect square number.

A

1, 4, 5, 8 ,9

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B

1, 4, 5, 6 ,9

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C

1, 3, 5, 6 ,7

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D

1, 4, 5, 7 ,9

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Solution

The correct option is B
1, 4, 5, 6 ,9

If a number is a perfect square, then it always ends with 1, 4, 5, 6, 9.

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Random Interesting Patterns Followed by Square Numbers

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