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MATHS MCQ

Rational Numbers · ICSE STD 8 (ICSE - English Medium). 16 questions.

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16 questions · timed · auto-graded

MCQ 11 Mark
Which of the following statement is true?
  • A
    $\frac{-4}{5} \div \frac{3}{11}=\frac{3}{11} \div \frac{-4}{5}$
  • B
    $\frac{2}{3} \div\left(\frac{5}{8} \div \frac{-4}{7}\right)=\left(\frac{2}{3} \div \frac{5}{8}\right) \div \frac{-4}{7}$
  • C
    $ \frac{-3}{17} \div\left(\frac{4}{5}+\frac{-2}{3}\right)$
    $ =\left(\frac{-3}{17} \div \frac{4}{5}\right)+\left(\frac{-3}{17} \div \frac{-2}{3}\right)$
  • ✓
    $\left(\frac{4}{5}+\frac{-2}{3}\right) \div \frac{-3}{17}$
    $\quad=\left(\frac{4}{5} \div \frac{-3}{17}\right)+\left(\frac{-2}{3} \div \frac{-3}{17}\right)$
Answer
Correct option: D.
$\left(\frac{4}{5}+\frac{-2}{3}\right) \div \frac{-3}{17}$
$\quad=\left(\frac{4}{5} \div \frac{-3}{17}\right)+\left(\frac{-2}{3} \div \frac{-3}{17}\right)$
$\left(\frac{4}{5}+\frac{-2}{3}\right) \div \frac{-3}{17}$
$=\left(\frac{4}{5} \div \frac{-3}{17}\right)+\left(\frac{-2}{3} \div \frac{-3}{17}\right) \text { is true. }$
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MCQ 21 Mark
Reciprocal of a negative number is
  • A
    positive
  • ✓
    negative
  • C
    can not say
  • D
    does not exist
Answer
Correct option: B.
negative
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MCQ 31 Mark
What should be subtracted from $\frac{-5}{3}$ to get $\frac{-2}{7}$ ?
  • A
    $\frac{29}{21}$
  • B
    $\frac{-21}{29}$
  • ✓
    $\frac{-29}{21}$
  • D
    $\frac{21}{29}$
Answer
Correct option: C.
$\frac{-29}{21}$
Required number $=\frac{-5}{3}-\left(\frac{-2}{7}\right)$
$=\frac{-35+6}{21}$
$=\frac{-29}{21}$
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MCQ 41 Mark
Rational number represented by the point $P$ on the number line is
Image
  • A
    $\frac{-5}{7}$
  • ✓
    $\frac{-3}{7}$
  • C
    $\frac{-5}{8}$
  • D
    $\frac{-4}{8}$
Answer
Correct option: B.
$\frac{-3}{7}$
Rational number represented by the point $P$ on the given number line is $\frac{-3}{7}$
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MCQ 51 Mark
Product of two rational numbers is $1$ , if one of them is $\frac{10}{3}$, then other is
  • ✓
    $\frac{3}{10}$
  • B
    $\frac{-3}{10}$
  • C
    $\frac{10}{3}$
  • D
    None of these
Answer
Correct option: A.
$\frac{3}{10}$
Product of two rational numbers is $1 .$
If one of them is $\frac{10}{3}$, then the other is $\frac{3}{10}$.
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MCQ 61 Mark
Sum of two rational numbers is $0$ , if one ofthem is $\frac{-4}{5}$, then other is
  • A
    $\frac{5}{4}$
  • ✓
    $\frac{4}{5}$
  • C
    $\frac{-5}{4}$
  • D
    $\frac{-4}{5}$
Answer
Correct option: B.
$\frac{4}{5}$
Sum of two rational numbers is $0$ , if one of them is $\frac{-4}{5}$, then other will be $\frac{4}{5}$.
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MCQ 71 Mark
Sum of rational number $\frac{4}{7}$ and its reciprocal is
  • A
    $\frac{28}{65}$
  • ✓
    $\frac{65}{28}$
  • C
    $\frac{-28}{65}$
  • D
    $\frac{-65}{28}$
Answer
Correct option: B.
$\frac{65}{28}$
Sum of rational number $\frac{4}{7}$ and its reciprocal is $\frac{65}{28}$.
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MCQ 81 Mark
Product of rational number $\frac{-2}{5}$ and its additive inverse is
  • A
    $0$
  • B
    1
  • ✓
    $\frac{-4}{25}$
  • D
    $\frac{-5}{2}$
Answer
Correct option: C.
$\frac{-4}{25}$
Product of a rational number $\frac{-2}{5}$ and its additive inverse is $\frac{-4}{25}$.
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MCQ 91 Mark
Multiplication of a non$-$zero rational number and its reciprocal is
  • A
    $0$
  • ✓
    $1$
  • C
    $-1$
  • D
    None of these
Answer
Correct option: B.
$1$
Multiplication of a non$-$zero rational number and its reciprocal is $1$.
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MCQ 101 Mark
$\frac{p}{q}+\left(\frac{r}{s}+\frac{t}{u}\right)=\left(\frac{p}{q}+\frac{r}{s}\right)+\frac{t}{u}$ is called
  • A
    commutative property
  • ✓
    associative property
  • C
    distributive property
  • D
    None of these
Answer
Correct option: B.
associative property
$\frac{p}{q}+\left(\frac{r}{s}+\frac{t}{u}\right)=\left(\frac{p}{q}+\frac{r}{s}\right)+\frac{t}{u}$ is called associative property.
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MCQ 111 Mark
$\frac{2}{3} \div 0$ is equal to
  • A
    $\frac{2}{3}$
  • B
    $\frac{3}{2}$
  • ✓
    $0$
  • D
    not defined
Answer
Correct option: C.
$0$
 $\frac{2}{3} \div 0$ is equal to $0$ .
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MCQ 121 Mark
$0 \div \frac{2}{3}$ is equal to
  • A
    $\frac{2}{3}$
  • B
    $\frac{3}{2}$
  • ✓
    $0$
  • D
    not defined
Answer
Correct option: C.
$0$
 $0 \div \frac{2}{3}$ is equal to $0$ .
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MCQ 131 Mark
Rational numbers are not closed under
  • A
    addition
  • B
    subtraction
  • C
    multiplication
  • ✓
    division
Answer
Correct option: D.
division
Rational numbers are not closed under division.
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MCQ 141 Mark
Sum of a rational number and its additive inverse is
  • A
    $1$
  • ✓
    $0$
  • C
    $-1$
  • D
    None of these
Answer
Correct option: B.
$0$
Sum of a rational number and its additive inverse is $0$.
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MCQ 151 Mark
Multiplicative inverse of $\frac{-3}{7}$ is
  • A
    $\frac{7}{3}$
  • ✓
    $\frac{-7}{3}$
  • C
    $\frac{3}{7}$
  • D
    None of these
Answer
Correct option: B.
$\frac{-7}{3}$
Multiplicative inverse of $\frac{-3}{7}$ is $\frac{-7}{3}$.
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MCQ 161 Mark
Additive inverse of $\frac{-2}{-5}$ is
  • A
    $\frac{2}{5}$
  • B
    $\frac{5}{2}$
  • ✓
    $\frac{2}{-5}$
  • D
    $\frac{5}{-2}$
Answer
Correct option: C.
$\frac{2}{-5}$
 Additive inverse of $\frac{-2}{-5}$ is $\frac{2}{-5}$.
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