CBSE Syllabus Standard Mathematics for Class X>Chapter 1 - Real Numbers>Objective Questions>Q 20

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If $n$ is a natural number, then $12^{n}$ will always end with an even digit except

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Important Questions on Real Numbers

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CBSE Syllabus Standard Mathematics for Class X>Chapter 1 - Real Numbers>Objective Questions>Q 21

The number

{(\sqrt{3} + \sqrt{5})}^{2}

is

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CBSE Syllabus Standard Mathematics for Class X>Chapter 1 - Real Numbers>Objective Questions>Q 22

The number

\frac{\sqrt{5} + 2}{\sqrt{5} - 2}

is

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CBSE Syllabus Standard Mathematics for Class X>Chapter 1 - Real Numbers>Objective Questions>Q 23

If

x

is a positive rational number which is not a perfect square, then

- 5 \sqrt{x}

is

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CBSE Syllabus Standard Mathematics for Class X>Chapter 1 - Real Numbers>Objective Questions>Q 24

A rational number

\frac{p}{q}

,

q \neq 0

,

p and q

are co-prime, has a terminating decimal expansion if the prime factorisation of

q

is of the form (

m, n

are non-negative integers)

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CBSE Syllabus Standard Mathematics for Class X>Chapter 1 - Real Numbers>Objective Questions>Q 25

Which of the following numbers has a non-terminating repeating decimal expansion?

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CBSE Syllabus Standard Mathematics for Class X>Chapter 1 - Real Numbers>Objective Questions>Q 26

The decimal expansion of the rational number

\frac{11}{2^{3} \times 5^{2}}

will terminate after:

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CBSE Syllabus Standard Mathematics for Class X>Chapter 1 - Real Numbers>Objective Questions>Q 27

The decimal expansion of

\frac{6}{1250}

will terminate after:

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CBSE Syllabus Standard Mathematics for Class X>Chapter 1 - Real Numbers>Objective Questions>Q 28

Show that the product of any three consecutive positive integers is divisible by

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