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CBSE

Grade 9 Number System MCQ

1. The decimal representation of a rational number cannot be

 
 
 
 

2. If

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

 
 
 
 

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

 
 
 
 

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.

 
 
 
 

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

 
 
 
 

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