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Subjects
Class 10MathematicsReal NumbersProof of irrationality of √2, √3, √5EasyLevel 18
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Why are (\sqrt{2}), (\sqrt{3}), and (\sqrt{5}) not taken as integers?

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Answer and explanation

Correct answer: Because (2), (3), and (5) are not perfect squares

Step 1: The square root of a perfect square is an integer. Step 2: (2), (3), and (5) are not perfect squares. Step 3: Therefore their square roots are proved irrational.

Related tags

Non Perfect SquareIrrational RootsClass 10

Frequently asked questions

What is the correct answer to this question?

Because (2), (3), and (5) are not perfect squares

Why is this the correct answer?

Step 1: The square root of a perfect square is an integer. Step 2: (2), (3), and (5) are not perfect squares. Step 3: Therefore their square roots are proved irrational.

Which subject and chapter does this question cover?

This is a Class 10 Mathematics question. Chapter: Real Numbers. Topic: Proof of irrationality of √2, √3, √5.

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10 more MCQs
  1. 1Which assumption is taken first to prove that (\sqrt{2}) is irrational?
  2. 2If (\sqrt{2}=\frac{p}{q}), what is obtained after squaring both sides?
  3. 3From the equation (p^2=2q^2), what do we learn about (p^2)?
  4. 4If (p^2) is even, which conclusion about (p) is correct?
  5. 5If (p) is even, in which form can (p) be written?
  6. 6What conclusion is obtained by putting (p=2k) in (p^2=2q^2)?
  7. 7What is the final contradiction in the proof of (\sqrt{2})?
  8. 8What is the correct final conclusion of the proof of (\sqrt{2})?
  9. 9If (\sqrt{3}) is assumed rational, in which form is it written?
  10. 10If (\sqrt{3}=\frac{p}{q}), which equation is obtained after squaring?
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