Square and Square Root (Exercise)

 Square of a number : When a number is multiplied by itself then that product is called square of a number. 

                   For example: Square of 3 = (3)² = 3x3 = 9

Note: Square of negative number is always positive.

                  For example: Square of  (-5) = (-5)² = -5 x -5 = (+ 25)

Square Root : When a number is multiplied by itself to get the original number, then it is called square root. It is denoted by the symbol √ (Tick) called radical.

For example: Square root of 9 = √9= √3x3  = 3 

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Square Numbers

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Practice Work:

1. What is 10 squared?
     a) 20.  b) 100.  c) 200

2.  Which of the following is a square of 9?
      a) 81.  b) 3.   c) both of them

3. 11 multiplied by 11 is.....
      a) 11    b) 22.    c) 121

4. Which of the number has a square equal
        to itself.
      a) 1.    b) 2.    c) 3

5. RAM is thinking about a square number between
     2 and 50, which is also an odd number and factors
     of 50. What is that number ?
      a) 1.    b) 5.   c) 25

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