Practice MCQ Questions and Answer on Ratio
81.
Two numbers are in the ratio 3 : 5. If 6 is added to both of them, the ratio becomes 2 : 3. The numbers are = ?
- (A) 21 and 35
- (B) 30 and 50
- (C) 24 and 40
- (D) 18 and 30
82.
If a : b : c = 3 : 4 : 7, then the ratio (a + b + c) : c is equal to
- (A) 2 : 1
- (B) 14 : 3
- (C) 7 : 2
- (D) 1 : 2
83.
80% of a number is equal to the $$\frac{{\text{4}}}{{\text{5}}}$$ th of the other number. what is the ratio between the first number and the second number respectively ?
- (A) 3 : 4
- (B) 3 : 5
- (C) 5 : 3
- (D) None of these
84.
In a mixture of 25 litres the ratio of acid to water is 4 : 1. Another 3 litres of water of water is added to the mixture. The ratio of acid to water in the new mixture is = ?
- (A) 5 : 2
- (B) 2 : 5
- (C) 3 : 5
- (D) 5 : 3
85.
In a college the students in Arts and commerce faculties were in the ratio of 4 : 5 respectively. When 65 more students joined commerce faculty the ratio becomes 8 : 11 respectively. How many students are there in Arts faculty?
- (A) 520
- (B) 650
- (C) 715
- (D) Cannot be determined
86.
The ration 43.5 : 25 is the same as = ?
- (A) 4 : 1
- (B) 2 : 1
- (C) 1 : 2
- (D) 1 : 4
87.
The fourth proportional to 10, 12, 15 is:
- (A) 24
- (B) 22
- (C) 18
- (D) 20
88.
A mixture contains milk and water in the ratio 5 : 1. On adding 5 litres of water, the ratio of milk and water becomes 5 : 2. The quantity of milk in the mixture is = ?
- (A) 16 litres
- (B) 25 litres
- (C) 32.5 litres
- (D) 22.75 litres
89.
If x : y = 7 : 3, then the value of $$\frac{{xy + {y^2}}}{{{x^2} - {y^2}}}$$ ÃÂÃÂ is
- (A) $$\frac{3}{4}$$
- (B) $$\frac{4}{3}$$
- (C) $$\frac{3}{7}$$
- (D) $$\frac{7}{3}$$
90.
Ratio of earnings of A and B is 8 : 9 respectively. If the earnings of A increase by 50% and the earnings of B decrease by 25%, the new ratio of their earnings becomes 16 : 9 respectively. What are A's earnings?
- (A) Rs. 22000
- (B) Rs. 28500
- (C) Rs. 37000
- (D) Cannot be determine