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Between which two consecutive integers does \(\sqrt{40}-2\) lie on the number line?

Answer and explanation

Correct answer: 4 and 5

Since \(6^2=36<40<49=7^2\), we get \(6<\sqrt{40}<7\). Subtracting 2 from all parts gives \(4<\sqrt{40}-2<5\), so the number lies between 4 and 5. Option A is incorrect because the value is greater than 4. Exam tip: bound the square root using consecutive perfect squares, then apply the operation to the entire inequality.

Related tags

Number LineSquare RootsInteger BoundsPolynomialsReal NumbersRepresenting Real Numbers On The Number LineMathematicsClass 10 Mcq

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