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Class 10MathematicsReal NumbersIrrational numbersEasyLevel 13
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Which is the simplified form of (\sqrt{20})?

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Answer and explanation

Correct answer: (2\sqrt{5})

Step 1: (20=4 \times 5). Step 2: (\sqrt{20}=\sqrt{4 \times 5}=2\sqrt{5}). Step 3: Take the perfect square outside the root and leave the remaining factor inside.

Related tags

Real-NumbersRadical-SimplificationSqrt20

Frequently asked questions

What is the correct answer to this question?

(2\sqrt{5})

Why is this the correct answer?

Step 1: (20=4 \times 5). Step 2: (\sqrt{20}=\sqrt{4 \times 5}=2\sqrt{5}). Step 3: Take the perfect square outside the root and leave the remaining factor inside.

Which subject and chapter does this question cover?

This is a Class 10 Mathematics question. Chapter: Real Numbers. Topic: Irrational numbers.

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10 more MCQs
  1. 1Which of the following numbers is irrational?
  2. 2Which of the following numbers is rational?
  3. 3What type of number is (\sqrt{16})?
  4. 4Which statement about (\sqrt{10}) is correct?
  5. 5Which of the following is an example of an irrational number?
  6. 6Which decimal form represents an irrational number?
  7. 7What type of number is (0.3333\ldots)?
  8. 8Which statement is correct about (0.101001000100001\ldots)?
  9. 9If (a) is a non-zero rational number and (b) is an irrational number, what type of number is (ab) generally?
  10. 10What type of number is (\sqrt{2}+3)?
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