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

Answer and explanation

Correct answer: 2.5

The governing idea is the order relation of real numbers on a number line. A number x lies strictly between 2 and 3 when it satisfies both inequalities 2<x and x<3, or together 2<x<3. Test option A: 2<2.5<3, so 2.5 is located to the right of 2 and to the left of 3. Option B, 3.5, is greater than 3. Option C, 1.5, is less than 2, and option D, 4.5, is also greater than 3. Therefore only option A lies in the required interval. The endpoints 2 and 3 would not count under the usual meaning of “between,” because the question asks for an interior point. A decimal such as 2.1 or 2.9 would also work, but among the given choices 2.5 is the only valid answer.

Related tags

Number LineDecimalReal NumbersComparisonRepresenting Real Numbers On The Number LinePolynomialsMathematicsClass 10 Mcq

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