What will be the unit digit of the squares of the following numbers?(i)  81                 (ii) 272                (iii) 799                   (iv) 3853(v) 1234             (vi) 26387           (vii) 52698              (viii) 99880(ix) 12796          (x) 55555

Explanation

Unit digit of a square of a number is equal to the unit digit of square of unit digit of that number.

So,

(i)`81` - Unit digit of square of `81` will be `1`.

(ii)`272` - Unit digit of square of `272` will be `4`.

(iii)`799` - Unit digit of square of `799` will be `1`.

(iv)`3853` - Unit digit of square of `3853` will be `9`.

(v)`1234` - Unit digit of square of `1234` will be `6`.

(vi)`26387` - Unit digit of square of `26387` will be `9`.

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