Rational & irrational numbers

Which of the following is irrational?

• 3

• 1/2

Which of the following is rational?

Which of the following is irrational?

• 1/3

• 1/9

• 2/5

• 22/7

R + R = R

• always true

• sometimes true

• never true

• none of these

Which of the following is true?

• The square root of prime numbers are irrational

• The square root of prime numbers are rational

• none of these are true

• The square root of prime numbers are both irrational and rational

R + I = I

• never true

• always true

• sometimes true

• none of these

I + I = I

• always true

• sometimes true

• never true

• none of these

R . R = R

• always true

• sometimes true

• never true

• none of these

R . I = I

• always true

• true, except for zero

• never true

• none of these

I . I = I

• always true

• sometimes true

• never true

• none of these