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Which number lies between √3 and 2 on the number line?

Answer and explanation

Correct answer: 1.8

The governing concept is comparison of real numbers on a number line. Estimate the irrational endpoint using squares: 1.7²=2.89 and 1.8²=3.24, so √3 is approximately 1.732. Therefore the open interval between √3 and 2 is approximately (1.732,2). The number 1.8 lies in this interval, so option B is correct. In contrast, 1.6 is less than √3, while 2.1 and 3 are both greater than 2. Hence those values cannot lie strictly between the two endpoints. Comparing squares gives a dependable bound for √3 and avoids the incorrect assumption that the irrational number is equal to a nearby integer.

Related tags

Number-LineIrrational-NumbersComparisonEstimationRepresenting Real Numbers On The Number LinePolynomialsMathematicsClass 10 Mcq

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