- A
- B
- C
- D
Step-by-Step Solution
Strip C has 4 times as many parts as A, so each part of A is 4 parts of C: . Shading 12 of the 20 parts covers the same length.
Answer: B)
Strips A and B are the same length, and their shading shows (shaded = negative). Strip C is cut into 20 equal parts. Which rational number with denominator 20 equals ?
Class 7Rational NumbersRational Numbers
Key idea: Recognising rationals
If you can write a number as **integer over non-zero integer**, it is rational. So:
- All integers are rational: 5 = 5/1, 0 = 0/1, −9 = −9/1.
- All fractions with integer numerator and denominator are rational: 3/4, −2/7, 11/3.
- Any decimal that terminates or repeats is rational: 0.25 = 1/4, 0.333… = 1/3.
Numbers that cannot be written as p/q (like √2 or π) are NOT rational — they're irrational. You'll meet those in Class 9.
- All integers are rational: 5 = 5/1, 0 = 0/1, −9 = −9/1.
- All fractions with integer numerator and denominator are rational: 3/4, −2/7, 11/3.
- Any decimal that terminates or repeats is rational: 0.25 = 1/4, 0.333… = 1/3.
Numbers that cannot be written as p/q (like √2 or π) are NOT rational — they're irrational. You'll meet those in Class 9.
Master this chapter in 30 minutes a day.
Don't just memorise the answer — build a daily practice habit.
Practice 5 Similar Questions Free →All Rational Numbers practice questions
More Class 7 Rational Numbers practice
Points A and B are marked on the number line. Each unit is cut into equal parts. How far…Arrange the rational numbers on the four cards in ascending order (smallest first).Find a rational number between 1/4 and 1/2.Order from smallest to largest: -2/3, 1/2, -3/4, 0. Which option lists them correctly?A rational number is a number that can be written in the form p/q where p and q are…