Q:

What is the square root of 61?

A:

The square root of 61 is 7.81. A squared number means that number is multiplied by itself. The square root is the opposite. It indicates the number, when multiplied by itself, equals the first number.

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Square roots are represented by a special symbol called a radical. This symbol looks like a check mark. A square root equation is written like this: ?16=4.

Squares of whole numbers are called perfect squares. For example: ?1=1, ?4=2 and ?9=3.

Square roots are useful when you need to calculate area. A real-life example is calculating how much carpet is needed for a room. If the room is 100 square feet (?100=10), you buy a piece of carpet that is 10 feet wide and 10 feet long.

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