Grade 9 Number System MCQ, Online Test. CBSE curriculum.

1. The decimal representation of a rational number cannot be

terminating.

non-terminating.

non-terminating repeating decimal.

non-terminating non-repeating decimal.

2. If

$\sqrt{3}= 1.732, then \, the \, value\, of\, \sqrt{25} + \sqrt{75} +\sqrt{108}-\sqrt{243} \,\, is$

4√3

8.660

√3

5

3. $If\, x\, =\, 9\, +\,4\sqrt{5} ,\, then\, the \, value\, of\, \left ( x\, +\, \frac{1}{x} \right )\, is$

18

4

16

8

4. $If \, a\, and\, b\, are\, rational\, numbers\, and\, \frac{5+2\sqrt{3}}{7+4\sqrt{3}}\, =a-\, b\sqrt{3},\, then\, find\, a\, and\, b.$

a= -11 and b = 6

a= 11 and b = 6

a= 11 and b = -6

None

5. $The \, value\, of\, x\, in\, \sqrt{5+\sqrt[3]{x}}\, =\, 3 ,\, is$

9

64

3

4

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