Class 8 : Chapter 1- Rational Numbers

A number of the form p/q is said to be a rational number if

• p and q are integers

• p and q are integers and p is not equal to zero.

• p and q are integers and q is not equal to zero.

• and q are integers and p and q both are not equal to zero.

If x be any rational number, than x+0 is

• -x

• 0

• x

• 1/x

Reciprocal of x is

• -x

• 1/x

• x+1

• x

Additive identity of rational numbers is

• 1

• -1

• x

• 0

Multiply 6/13 by the reciprocal of -7/16

• -96/91

• 91/-96

• 96/91

• None of the above

Additive inverse of

 $\frac{5}{4}$  is ?

• 0

• 1

•  $-\frac{5}{4}$  

•  $-\frac{4}{5}$  

Multiplicative Inverse of -5 is

• 0

• 1

• 
  

  $\frac{1}{5}$
  

• $\frac{1}{-5}$

 $\frac{-1}{4\ }\ +\ \frac{-3}{4}\ =\ ?$  

• 0

• 1

• -1

•  $\frac{3}{16}$  

 $\left(-\frac{5}{9}\div\frac{2}{3}\right)\ =\ ?$  

•  $-\frac{5}{2}$  

•  $-\frac{5}{6}$  

•  $-\frac{10}{27}$  

•  $-\frac{6}{5}$  

 $\left(-\frac{9}{16}\times\frac{8}{15}\right)\ =\ ?$  

•  $-\frac{3}{10}$  

•  $-\frac{4}{15}$  

•  $-\frac{9}{25}$  

•  $-\frac{2}{5}$