Question

What will be the unit digit of the squares of the following numbers like 539​

Answer 1

Answer:

==: 539²

==: .....81

==: unit digit = 1

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Answer 2

For

5 => unit digital is 5 ( it's square always end with 25)

3=> unit digit is always 9(e.g 13^2 is 169)

9=>unit digit is always 1(e.g29^2 is 841)

Hope it will help you