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  • How many irrational numbers are there: √2, √4, √(21/4), ∛27
Multiple choice

How many irrational numbers are there: √2, √4, √(21/4), ∛27

  1. zero

  2. one

  3. two

  4. more than two

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

sqrt(2) is irrational. sqrt(4) = 2 (rational). sqrt(2 1/4) = sqrt(9/4) = 3/2 = 1.5 (rational). cbrt(27) = 3 (rational). Only one number is irrational.

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