A number when added to its one - third equals 28 . Find the number

21

Step-by-step explanation:

Let's say number is x.

x + 1/3 x = 28.

1 1/3x = 28.

1/3 x = 7

x = 21

answer: 4  

the square root of 16 is 4. it is a very simple mathematic concept. a square root when a number multiplied by itself will result in a number. here, the number 16 comes when 4 is multiplied by 4. hence the square root of 16 is 4. you can always figure out a square root by the inverse operation of squaring.  

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