Mathematics Quiz Grade-8

Is-0.4 a rational number?

• No,because it cannot be written in the form of p/q

• Yes, because it can be written in the form of p/q

• Yes, because it is a negative number

• No, because it is a negative number

Which of these options complete the sentence below?
 $The\ equation\ \frac{-25}{9}-\frac{7}{3}=\frac{-46}{9}Show\ that\ ..........$  

• Rational number are not closed under subtraction 

• Rational number are not closed under division

• Rational number are  closed under subtraction 

• Rational number are  closed under division

Consider the equation below
 $\frac{5}{6}+\left(\frac{1}{8}+\frac{16}{5}\right)\ =A+\frac{1}{8}$  
Which of these is equivalent to A?

•  $\frac{5}{48}+\frac{16}{5}$  

•  $\frac{5}{6}+\frac{1}{8}$  

•  $\frac{1}{8}+\frac{16}{5}$  

•  $\frac{5}{6}+\frac{16}{5}$  

If the multiplicative identity of rational number p/q " is x, what could be the value of x? 

•  $\frac{q}{p}$  

•  $\frac{p}{q}$  

• 0

• 1

 $Which\ of\ these\ statements\ is\ true\ about\ the\ rational\ number\ \frac{a}{b}?$  

•  $The\ additive\ identity\ of\ rational\ number,\frac{a}{b}is\frac{a}{b},$  

•  $The\ additive\ identity\ of\ rational\ number,\frac{a}{b}is-\frac{a}{b},$  

•  $The\ additive\ identity\ of\ rational\ number,\frac{a}{b}is\ 0$  

•  $The\ additive\ identity\ of\ rational\ number,\frac{a}{b}is\ 1$  

 $Consider\ the\ equation\ \frac{m}{5}+\left(\frac{-m}{5}\right)=0.$  

Which of these is true?

•  $\frac{-m}{5}is\ the\ additive\ inverse\ of\ \frac{m}{5}$  

•  $\frac{-m}{5}is\ the\ aadditive\ identity.$  

•  $\frac{-m}{5}is\ the\ multiplicative\ inverse\ of\ \frac{m}{5}$  

•  $\frac{-m}{5}is\ the\ multiplicative\ identity.$  

The distance of point p(2,3) from x-axis is

• 3 units.

• 2 units.

• 1 units.
  

• 5 units.

The distance between the points p(0,2) and Q(0,6) is

• 2 units.

• 4 units.

• 1 units.

• 5 units.

 $Consider\ the\ equation\ \frac{2}{3}×(p−q)=1.\$  
Which of these can be the values of p and q?

•  $p=\frac{3}{2}and\ q=1$  

•  $p=\frac{5}{2}and\ q=1$  

•  $p=\frac{3}{2}and\ q=\frac{5}{2}$  

•  $p=\frac{5}{2}and\ q=\frac{3}{2}$  

 $Which\ of\ these\ is\ equivalent\ for\ \frac{16}{9}×\ \left(\frac{5}{7}+\frac{13}{4}\right)?$  

•  $\frac{16}{9}×\ \frac{5}{7}×\ \frac{13}{4}$  

•  $\left(\frac{16}{9}×\ \frac{5}{7}\right)+\frac{13}{4}$  

•  $\left(\frac{16}{9}×\ \frac{5}{7}\right)\ +\left(\frac{16}{9}×\ \frac{13}{4}\right)$  

•  $\left(\frac{16}{9}×\ \frac{5}{7}\right)\ ×\ \left(\frac{16}{9}×\ \frac{13}{4}\right)$