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Which statement about whole numbers between \(\sqrt{18}\) and \(\sqrt{19}\) is correct?

Answer and explanation

Correct answer: There is no whole number between them

Since \(4^2=16<18<19<25=5^2\), we have \(4<\sqrt{18}<\sqrt{19}<5\). Both square roots lie between 4 and 5, and there is no whole number strictly between 4 and 5. Hence, no whole number lies between the two square roots, so option C is correct. Options A and B are incorrect because 4 is less than \(\sqrt{18}\), while 5 is greater than \(\sqrt{19}\). Exam tip: use the nearest perfect squares to locate square roots on the number line.

Related tags

Number SystemsReal NumbersSquare RootsWhole NumbersPerfect SquaresMathematicsClass 9 Mcq

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