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Which number is represented on the number line by \(\sqrt{\frac{169}{225}}\)?

Answer and explanation

Correct answer: \(\frac{13}{15}\)

Since \(169=13^2\) and \(225=15^2\), \(\sqrt{\frac{169}{225}}=\frac{\sqrt{169}}{\sqrt{225}}=\frac{13}{15}\). The principal square root is non-negative, so the positive values 13 and 15 are used. Option B is the original fraction, not its square root. Exam tip: For a fraction whose numerator and denominator are perfect squares, take the positive square root of each separately.

Related tags

PolynomialsReal NumbersNumber LineSquare RootsRational NumbersRepresenting Real Numbers On The Number LineMathematicsClass 10 Mcq

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