Ratio & Proportion Questions Answers – Quantitative Aptitude MCQ
Ratio and proportion are fundamental concepts in mathematics that find applications in various fields, from everyday life to advanced sciences. These concepts are not only crucial for solving mathematical problems but also play a significant role in decision-making, problem-solving, and critical thinking. In this article, we will delve into the world of ratio and proportion, exploring multiple-choice questions (MCQs) along with their answers to help you master these concepts.
Understanding Ratio and Proportion:
Before we dive into the MCQs, let’s ensure we have a clear understanding of ratio and proportion.
Ratio: A ratio is a quantitative relationship between two or more quantities, indicating how many times one quantity is contained within another. It is expressed as “a:b” or “a/b,” where “a” and “b” are non-negative numbers.
Proportion: A proportion is a statement that two ratios are equal. In other words, if two ratios have the same value, they are said to be in proportion.
1) Find the third Proportional to the numbers 5 and 10.
a) 20
b) 2.5
c) 25
d) 30
2) Ratio of the earnings of A and B is 4 : 7. If the earnings of A increases by 50% and those of B decreases by 25% , the new ratio of their earnings becomes 8 : 7. What are A’s earnings?
a) Rs 21,000
b) Rs 26,000
c) Rs 28,000
d) Data inadequate
3) Ratio of boys to the girls in a class is 5 : 4. Which of the following cannot be the number of students in the class ?
a) 45
b) 72
c) 108
d) 98
4) The third proportional to 0.36 and 0.48 is :
a) 0.1728
b) 0.64
c) 0.42
d) 0.94
5) What should be subtracted from each of the numbers 54,71,75 and 99, so that the remainders are in continued proportion?
a) 9
b) 7
c) 4
d) 3
6) If 40% of a number is equal to two-third of another number, what is the ratio of first number to the second number ?
a) 2 : 5
b) 3 : 7
c) 5 : 3
d) 7 : 3
7) The ratio of sprit and water in a mixture is 1 : 3. If the volume of the solution is increased by 25% by adding spirit only. What is the resultant ratio of spirit and water ?
a) 2 : 3
b) 1 : 4
c) 1 : 2
d) None of these
8) Rs. 120 are divided among A, B,C such that A’s share is Rs. 20 more than B’s and Rs.20 less than C’s. What is B’s share
a) Rs 10
b) Rs 20
c) Rs 24
d) Rs 28
9) Two numbers are in the ratio 3 : 5. If each number is increased by 10, the ratio becomes 5 : 7 the numbers are
a) 3,5
b) 7,9
c) 13,22
d) 15,25
10) Two Numbers are respectively 20% and 50% more than a third number. The ratio of the two numbers is :
a) 2 : 5
b) 3 : 5
c) 4 : 5
d) 6 : 7