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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

Every year CBSE students attend Annual Assessment exams for 6,7,8,9,11th standards. These exams are very competitive to all the students. So our website provides online tests for all the 6,7,8,9,11th standards’ subjects. These tests are also very effective and useful for those who preparing for any competitive exams like Olympiad etc. It can boost their preparation level and confidence level by attempting these chapter wise online tests.

These online tests are based on latest CBSE syllabus. While attempting these, our students can identify their weak lessons and continuously practice those lessons for attaining high marks. It also helps to revise the NCERT textbooks thoroughly

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