Class 7 Rational Numbers CBSE Questions & Answers

Class 7 · Rational Numbers

This is Mathematics Class 7 Rational Numbers CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
Simplify: \(\left[ {\frac{2}{3} \times \frac{{ - 5}}{4}} \right] + \left[ {\frac{{ - 10}}{3} \times \frac{5}{2}} \right] - \left[ {\frac{{ - 16}}{3} \times \frac{{ - 55}}{{32}}} \right]\).
  • A
    -18
  • B
    \( - 18\frac{1}{3}\)
    Correct
  • C
    \(\frac{1}{2}\)
  • D
    None of these
2
Mayank reads \(\frac{1}{3}\)of a storybook on the first day and \(\frac{1}{4}\) of the book on the second day. What part of the story book is yet to be read by Mayank?
  • A
    \(\frac{5}{{12}}part\)
    Correct
  • B
    whole part
  • C
    None of these
  • D
    \(\frac{1}{2}\)part
3
The reciprocal of a positive rational number is ________.
  • A
    0
  • B
    negative
  • C
    None of these
  • D
    positive
    Correct
4
What number should be subtracted from\(\frac{{ - 3}}{5}to\;get - 2\)?
  • A
    \(\frac{7}{5}\)
    Correct
  • B
    None of these
  • C
    \(\frac{5}{7}\)
  • D
    \(\frac{8}{5}\)
5
Which of the rational numbers \(\frac{{ - 11}}{{28}},\frac{{ - 5}}{7},\frac{9}{{ - 14}},\frac{{29}}{{ - 42}}\) is the greatest?
  • A
    \(\frac{9}{{ - 14}}\)
  • B
    \(\frac{{ - 11}}{{28}}\)
    Correct
  • C
    \(\frac{{ - 5}}{7}\)
  • D
    \(\frac{{29}}{{ - 42}}\)
6
Which of the rational numbers \(\frac{{ - 5}}{{16}},\frac{{ - 13}}{{24}},\frac{3}{{ - 4}},\frac{7}{{ - 12}}\) is the smallest?
  • A
    \(\frac{3}{{ - 4}}\)
    Correct
  • B
    \(\frac{{ - 13}}{{24}}\)
  • C
    \(\frac{{ - 5}}{{16}}\)
  • D
    \(\frac{7}{{ - 12}}\)
7
Simplify: \(\frac{2}{3} + \frac{{ - 4}}{5} + \frac{7}{{15}} + \frac{{ - 11}}{{20}}\)
  • A
    \(\frac{1}{4}\)
  • B
    \(\frac{1}{2}\)
  • C
    None of these
  • D
    \(\frac{{ - 13}}{{60}}\)
    Correct
8
Rational number \(\frac{3}{{40}}\)is equal to
  • A
    7.5
  • B
    None of these
  • C
    0.075
    Correct
  • D
    0.75
9
A rational number between 3 and 4 is:
  • A
    \(\frac{3}{4}\)
  • B
    \(\frac{3}{2}\)
  • C
    \(\frac{7}{2}\)
    Correct
  • D
    \(\frac{7}{4}\)
10
A rational number between \(\frac{3}{5}and\frac{4}{5}\)is:
  • A
    \(\frac{7}{2}\)
  • B
    \(\frac{7}{{10}}\)
    Correct
  • C
    \(\frac{7}{5}\)
  • D
    \(\frac{3}{{10}}\)
11
A rational number between \(\frac{1}{2}and\frac{3}{4}\)is
  • A
    \(\frac{5}{4}\)
  • B
    None of these
  • C
    \(\frac{5}{8}\)
    Correct
  • D
    \(\frac{5}{2}\)
12
The multiplicative inverse of \(\frac{7}{{40}}\) is
  • A
    1
  • B
    None of these
  • C
    \(\frac{{40}}{7}\)
    Correct
  • D
    0
13
Subtract \(\frac{{ - 1}}{2}\)from \(\frac{4}{5}\).
  • A
    \(\frac{{11}}{{13}}\)
  • B
    \(\frac{{10}}{{15}}\)
  • C
    None of these
  • D
    \(\frac{{13}}{{10}}\)
    Correct
14
Find x such that \(\frac{{ - 3}}{7}and\frac{x}{{ - 21}}\)are equivalent rational numbers.
  • A
    None of these
  • B
    13
  • C
    11
  • D
    9
    Correct
15
Identify the smallest rational number.
  • A
    \(\frac{{ - 9}}{{12}}\)
  • B
    \(\frac{{ - 8}}{9}\)
  • C
    \(\frac{5}{{ - 6}}\)
    Correct
  • D
    \(\frac{2}{3}\)