Square Roots

Front

What is a perfect square?

Back

A perfect square is a number that can be expressed as the product of an integer with itself. For example, 1, 4, 9, 16, 25 are perfect squares.

Front

List the first five perfect squares.

Back

1, 4, 9, 16, 25.

Front

What is the square root of 49?

Back

7, because 7 x 7 = 49.

Front

What is the square root of 100?

Back

10, because 10 x 10 = 100.

Front

Which of the following is not a perfect square: 36, 50, 64?

Back

50 is not a perfect square.

Front

What is the next perfect square after 25?

Back

36, because 6 x 6 = 36.

Front

Calculate 8².

Back

64, because 8 x 8 = 64.

Front

What is the square root of 16?

Back

4, because 4 x 4 = 16.

Front

If x² = 81, what is x?

Back

x = 9 or x = -9.

Front

What is the square root of a negative number?

Back

The square root of a negative number is not a real number; it is an imaginary number.