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## Thursday, 25 February 2021

### CBSE Class 7 Maths - MCQ and Online Tests - Unit 9 - Rational Numbers

#### CBSE Class 7 Maths – MCQ and Online Tests – Unit 9 – Rational Numbers

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#### CBSE Class 7 Maths – MCQ and Online Tests – Unit 9 – Rational Numbers

Question 1.
The denominator of the rational number 0 is
(a) 0
(b) 1
(c) -1
(d) any non-zero integer

Question 2.
The numerator of a rational number 8 is
(a) 2
(b) 4
(c) 6
(d) 8

Question 3.
The denominator of the rational number $$\frac { 7 }{ 13 }$$ is
(a) 13
(b) 7
(c) 6
(d) 91

Question 4.
The numerator of the rational number $$\frac { -3 }{ 4 }$$ is
(a) -3
(b) 3
(c) 4
(d) -4

Question 5.
The numerator of the rational number $$\frac { -2 }{ 9 }$$ is
(a) -2
(b) 2
(c) -9
(d) 9

Question 6.
The denominator of the rational number $$\frac { 5 }{ -3 }$$ is
(a) 5
(b) -3
(c) 3
(d) 8

Question 7.
The denominator of the rational number $$\frac { 3 }{ -7 }$$ is
(a) 7
(b) -7
(c) 3
(d) -3

Question 8.
The numerator of the rational number $$\frac { -2 }{ -5 }$$ is
(a) 2
(b) -2
(c) 5
(d) -5

Question 9.
the numerator of the rational number $$\frac { -5 }{ -3 }$$ is
(a) -5
(b) 5
(c) -3
(d) 3

Question 10.
The denominator of the rational number $$\frac { -2 }{ -9 }$$ is
(a) -2
(b) 2
(c) 9
(d) -9

Question 11.
The denominator of the rational number $$\frac { -6 }{ -5 }$$ is
(a) 6
(b) -6
(c) 5
(d) -5

Question 12.
The numerator of the rational number $$\frac { 3 }{ 5 }$$ is
(a) 3
(b) 5
(c) 2
(d) 8

Question 13.
The numerator of the rational number $$\frac { 1 }{ 100 }$$ is
(a) 100
(b) 1
(c) 10
(d) 99

Question 14.
The denominator of the rational number $$\frac { 4 }{ 7 }$$ is
(a) 7
(b) 4
(c) 3
(d) 11

Question 15.
The denominator of the rational number 8 is
(a) 8
(b) 2
(c) 4
(d) 1

Question 16.
The numerator of the rational number – 9 is
(a) -9
(b) 9
(c) 1
(d) -1

Question 17.
The denominator of the rational number – 9 is
(a) -9
(b) 9
(c) -1
(d) 1

Question 18.
if $$\frac { -3 }{ -5 }$$ = $$\frac { 9 }{ ? }$$, then ? =
(a) 15
(b) -15
(c) 9
(d) -9

Hint:
$$\frac{-3}{-5}$$ = $$\frac{-3Ũ-3}{-5Ũ-3}$$ = $$\frac{9}{15}$$

Question 19.
if $$\frac { -8 }{ -9 }$$ = $$\frac { -16 }{ ? }$$, then ? =
(a) 18
(b) -18
(c) 9
(d) -9

Hint:
$$\frac{-8}{-9}$$ = $$\frac{-8Ũ3}{-9Ũ2}$$ = $$\frac{-16}{-18}$$

Question 20.
If $$\frac { 3 }{ 4 }$$ = $$\frac { ? }{ 12 }$$, then ? =
(a) 3
(b) 6
(c) 9
(d) 12

Hint:
$$\frac{3}{4}$$ = $$\frac{3Ũ3}{4Ũ3}$$ = $$\frac{9}{12}$$

Question 21.
if $$\frac { 4 }{ 5 }$$ = $$\frac { 12 }{ ? }$$, then ? =
(a) 5
(b) 10
(c) 15
(d) 25

Hint:
$$\frac{4}{5}$$ = $$\frac{4Ũ3}{5Ũ3}$$ = $$\frac{12}{15}$$

Question 22.
if $$\frac { -4 }{ 7 }$$ = $$\frac { ? }{ 14 }$$, then ? =
(a) -4
(b) -8
(c) 4
(d) 8

Hint:
$$\frac{-4}{7}$$ = $$\frac{-4Ũ2}{7Ũ2}$$ = $$\frac{-8}{14}$$

Question 23.
if $$\frac { -7 }{ 11 }$$ = $$\frac { 14 }{ ? }$$, then ? =
(a) 11
(b) -11
(c) 22
(d) -22

Hint:
$$\frac{-7}{11}$$ = $$\frac{-7Ũ-2}{11Ũ-2}$$ = $$\frac{14}{-22}$$

Question 24.
Which of the following is a negative rational number?
(a) $$\frac { 1 }{ 2 }$$
(b) $$\frac { 3 }{ 4 }$$
(c) $$\frac { -4 }{ -5 }$$
(d) $$\frac { 2 }{ -3 }$$

Answer: (d) $$\frac { 2 }{ -3 }$$
Hint:
$$\frac{-4}{-5}$$ = $$\frac{4}{5}$$

Question 25.
Which of the following is a positive rational number?
(a) $$\frac { -1 }{ 2 }$$
(b) $$\frac { 2 }{ -3 }$$
(c) $$\frac { -3 }{ -4 }$$
(d) -5

Answer: (c) $$\frac { -3 }{ -4 }$$
Hint:
$$\frac{-3}{-4}$$ = $$\frac{3}{4}$$

Question 26.
The rational number $$\frac { 12 }{ 40 }$$ in standard 40 form is
(a) $$\frac { 3 }{ 10 }$$
(b) $$\frac { 6 }{ 10 }$$
(c) $$\frac { 3 }{ 20 }$$
(d) $$\frac { 6 }{ 20 }$$

Answer: (a) $$\frac { 3 }{ 10 }$$
Hint:
$$\frac{12}{40}$$ = $$\frac{12ũ4}{40ũ4}$$ = $$\frac{3}{10}$$

Question 27.
–$$\frac { 6 }{ 5 }$$ + 1 =
(a) –$$\frac { 6 }{ 5 }$$
(b) $$\frac { 6 }{ 5 }$$
(c) $$\frac { 5 }{ 6 }$$
(d) –$$\frac { 5 }{ 6 }$$

Answer: (a) –$$\frac { 6 }{ 5 }$$

Question 28.
$$\frac { 2 }{ 9 }$$ Ũ $$\frac { 27 }{ 8 }$$ =
(a) $$\frac { 4 }{ 3 }$$
(b) $$\frac { 3 }{ 4 }$$
(c) 3
(d) 4

Answer: (b) $$\frac { 3 }{ 4 }$$

Question 29.
$$\frac { 7 }{ 12 }$$ ũ ( –$$\frac { 7 }{ 12 }$$) =
(a) 1
(b) -1
(c) 7
(d) -7

Question 30.
The rational number $$\frac { -21 }{ 28 }$$ in standard form is
(a) $$\frac { -3 }{ 4 }$$
(b) $$\frac { 3 }{ 4 }$$
(c) $$\frac { 3 }{ 7 }$$
(d) $$\frac { -3 }{ 7 }$$

Answer: (a) $$\frac { -3 }{ 4 }$$
Hint:
$$\frac{-21}{28}$$ = $$\frac{-21ũ7}{28ũ7}$$ = $$\frac{-3}{4}$$

Question 31.
$$\frac { 17 }{ 11 }$$ – $$\frac { 6 }{ 11 }$$ =
(a) 1
(b) -1
(c) 6
(d) 3

Hint:
$$\frac{17}{11}$$ – $$\frac{6}{11}$$ = $$\frac{17-6}{11}$$ = $$\frac{11}{11}$$ = 1

Question 32.
$$\frac { 2 }{ -5 }$$ Ũ $$\frac { -5 }{ 2 }$$ =
(a) 1
(b) -1
(c) 2
(d) -5

Question 33.
–$$\frac { 6 }{ 5 }$$ Ũ 1 =
(a) –$$\frac { 6 }{ 5 }$$
(b) $$\frac { 6 }{ 5 }$$
(c) –$$\frac { 5 }{ 6 }$$
(d) $$\frac { 5 }{ 6 }$$

Answer: (a) –$$\frac { 6 }{ 5 }$$

Question 34.
The rational number $$\frac { -6 }{ -25 }$$ in standard form is
(a) $$\frac { 6 }{ 25 }$$
(b) $$\frac { -6 }{ 25 }$$
(c) $$\frac { 6 }{ -25 }$$
(d) $$\frac { -6 }{ 25 }$$

Answer: (a) $$\frac { 6 }{ 25 }$$
Hint:
$$\frac{-6}{-25}$$ = $$\frac{-6Ũ-1}{-25Ũ-1}$$ = $$\frac{6}{25}$$

Question 35.
Which of the following rational numbers -2 is equivalent to $$\frac { -2 }{ 5 }$$ ?
(a) $$\frac { -4 }{ 10 }$$
(b) $$\frac { -2 }{ 10 }$$
(c) $$\frac { -4 }{ 5 }$$
(d) $$\frac { -6 }{ 25 }$$

Answer: (a) $$\frac { -4 }{ 10 }$$
Hint:
$$\frac{-2}{5}$$ = $$\frac{-2Ũ2}{5Ũ2}$$ = $$\frac{-4}{10}$$

Question 36.
Which of the following rational numbers is not equivalent to $$\frac { 7 }{ -4 }$$ ?
(a) $$\frac { 14 }{ -8 }$$
(b) $$\frac { 21 }{ -12 }$$
(c) $$\frac { 28 }{ -16 }$$
(d) $$\frac { 7 }{ -8 }$$

Answer: (d) $$\frac { 7 }{ -8 }$$
Hint:
$$\frac{7}{-4}$$ = $$\frac{7Ũ2}{-4Ũ2}$$ = $$\frac{14}{-8}$$ ? $$\frac{7}{-8}$$

Question 37.
Which of the following rational numbers is not to equivalent to $$\frac { 3 }{ 5 }$$ ?
(a) $$\frac { 6 }{ 10 }$$
(b) $$\frac { -3 }{ -5 }$$
(c) $$\frac { 9 }{ 15 }$$
(d) $$\frac { 12 }{ 24 }$$

Answer: (d) $$\frac { 12 }{ 24 }$$
Hint:
$$\frac{3}{5}$$ = $$\frac{3Ũ4}{5Ũ4}$$ = $$\frac{12}{20}$$ ? $$\frac{12}{24}$$

Question 38.
Which of the following is correct?
(a) $$\frac { 1 }{ -2 }$$ > $$\frac { -1 }{ 3 }$$
(b) $$\frac { 1 }{ -2 }$$ < $$\frac { -1 }{ 3 }$$
(c) $$\frac { 1 }{ -2 }$$ = $$\frac { -1 }{ 3 }$$
(d) None of these

Answer: (b) $$\frac { 1 }{ -2 }$$ < $$\frac { -1 }{ 3 }$$

Question 39.
Which of the following is correct?
(a) 0 > $$\frac { -4 }{ 9 }$$
(b) 0 < $$\frac { -4 }{ 9 }$$
(c) 0 = $$\frac { 4 }{ 9 }$$
(d) None of these

Answer: (a) 0 > $$\frac { -4 }{ 9 }$$

Question 40.
Which of the following is correct?
(a) –$$\frac { 4 }{ 5 }$$ < – $$\frac { 3 }{ 10 }$$
(b) –$$\frac { 4 }{ 5 }$$ > – $$\frac { 3 }{ 10 }$$
(c) –$$\frac { 4 }{ 5 }$$ = – $$\frac { 3 }{ 10 }$$
(d) None of these

Answer: (a) –$$\frac { 4 }{ 5 }$$ < – $$\frac { 3 }{ 10 }$$

Question 41.
The reciprocal of $$\frac { -2 }{ 5 }$$ is
(a) $$\frac { -5 }{ 2 }$$
(b) $$\frac { 5 }{ 2 }$$
(c) $$\frac { 2 }{ 5 }$$
(d) $$\frac { -2 }{ 5 }$$

Answer: (a) $$\frac { -5 }{ 2 }$$

Question 42.
The sum $$\frac { 5 }{ 4 }$$ + (- $$\frac { 25 }{ 4 }$$) =
(a) -5
(b) 5
(c) 4
(d) -4

Hint:
$$\frac{5}{4}$$ + ($$\frac{-25}{4}$$) = $$\frac{5+(-25)}{4}$$ = $$\frac{-20}{4}$$ = -5

Question 43.
The sum –$$\frac { 3 }{ 4 }$$ + 0 =
(a) $$\frac { 3 }{ 4 }$$
(b) –$$\frac { 3 }{ 4 }$$
(c) 1
(d) 0

Answer: (b) –$$\frac { 3 }{ 4 }$$

Question 44.
The denominator of the rational number $$\frac { -13 }{ -11 }$$ is
(a) -13
(b) 13
(c) 11
(d) -11

Question 45.
The numerator of the rational number 0 is
(a) 0
(b) 1
(c) 2
(d) 3