. What will be the unit digit of the squares of the following numbers? i. 81 ii. 272

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Dear Student

The unit digit of square of a number having 'a' at its unit place ends with a×a.

i.The unit digit of the square of a number having digit 1 as unit’s place is1.∴ Unit digit of the square of number 81 is equal to 1.

ii. The unit digitof the square of a number having digit 2 as unit’s place is4.∴ Unit digit of the square of number 272 is equal to 4.



Thanks