Test Details

Rational Numbers

Study point

Mar 28, 4:04 PM

60 minutes

Mar 29, 5:00 PM

40.0 marks

MCQ

20 questions

STUDY POINT CBSE ICSE

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Class Details

Maths

Phy Chemistry Biology

Class 8

Maths

Phy Chemistry Biology

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Question Text

Question 4 :
Which of the following rational numbers lies between $\dfrac {3}{2}$ and $4$ ?

Question 5 :
Which of the following numbers lies between $2\dfrac {1}{7}$ and $3\dfrac {1}{7}$?

Question 6 :
There exists ....... number of rational numbers between $\dfrac {2}{5}$ and $\dfrac {4}{5}.$

Question 7 :
The rational number lying exactly in between the numbers $\displaystyle \frac { 1 }{ 5 } $ and $\displaystyle \frac { 1 }{ 3 } $ is

Question 8 :
Milk is sold at $Rs\ 10\dfrac {3}{4}$ per liter, Find the cost of $6\dfrac {2}{5}$ liters of milk.

Question 10 :
The Rational Number $\dfrac { -18 }{ 5 } $ lies between the consecutive integers

Question 11 :
If $(81\div 9)\div 3=a$ and $81\div(9\div 3)=b$, then which of the following is correct?

Question 12 :
The rational number lying between the numbers $\displaystyle \frac{1}{3}$ and $\displaystyle \frac{3}{4}$ are

Question 13 :
Which of the following alternatives is wrong? Given that (i) difference of two rational numbers is a rational number (ii) subtraction is commutative on rational numbers (iii) addition is not commutative on rational numbers.

Question 14 :
Simplify using associative property : $\dfrac {-8}{9}\times \left (\dfrac {27}{32} \times \dfrac {-8}{21}\right )$

Question 16 :
For any two real number, an operation defined by $a* b= 1 +ab$ is.

Question 18 :
The value of $2\dfrac {1}{2} \times 10 - 4\dfrac {1}{3} \times 10$ is

Question 19 :
$G$ is a set of all rational numbers except $-1$ and $\ast $ is defined by $a\ast b=a+b+ab$ for all $a,b\in G$, in the group $\left( G,\ast \right) $, the solution of ${ 2 }^{ -1 }\ast x\ast { 3 }^{ -1 }=5$ is

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