Multiple choice

How many integers are there: √18, ∛-8,√8, ∛-81, √81?

  1. zero

  2. two

  3. three

  4. more than three
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

sqrt(18) is irrational. cbrt(-8) = -2 (integer). sqrt(8) is irrational. cbrt(-81) is irrational. sqrt(81) = 9 (integer). There are two integers: -2 and 9.

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