Irrational, Rational, and Roots

A rational number can be written as a fraction.

• True
• False

0.8 is a rational number

• True
• False

Which of the following is rational?

• .211232112421125. . . .
• π
• √25
• √12

Which number is an irrational number?

• 2.5
• 5.72314.....
• -17
• 1/2

Is the following number rational or irrational? (π / 2)

• Rational
• Irrational

√121

• 12
• 10
• 11
• 3

Which number is a rational number?

• 2.25
• -8.78654684598.....
• Square root of 99
• 3.14...

All the following are Perfect Squares except for which one?

• 81

• 121

• 64

• 198

Between which two whole numbers is the
√5?

• 1 and 2
• 2 and 3
• 3 and 4
• 4 and 5

Which statement is NOT true?

• √169 = 13

• 15² = 225

• 4² = √16

• √324 = 18