MCQ

Numerical: surds MCQ - Practice Questions with Answers

Solve 1 Numerical: surds questions for RAS/RPSC preparation.

Practice questions

Q1If √80 + 6√5 = 22.35, what will be the value of 3√5 + √125?

A 16

B 17.88

C 22.88

D 25.88

Explanation

√80 is equal to 4√5, so the given expression becomes 4√5 + 6√5 = 10√5. Since 10√5 = 22.35, the value of √5 is 2.235. Now √125 is equal to 5√5. Therefore, 3√5 + √125 becomes 3√5 + 5√5 = 8√5. Multiplying 8 by 2.235 gives 17.88. The values 16, 22.88 and 25.88 do not follow from the given relation, because they would require a different value of √5.

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