# Percentages

### A and B are two heavy steel blocks. If B is placed on the top of A

A and B are two heavy steel blocks. If B is placed on the top of A, the weight increases by 60%. How much weight will reduce with respect to the total weight of A and B, if B is removed from the top of A?

1. 60%
2. 45.5%
3. 40%
4. 37.5%

### A student has to get 40% marks to pass in an examination

A student has to get 40% marks to pass in an examination. Suppose he gets 30 marks and fails by 30 marks, then what are the maximum marks in the examination?

1. 100
2. 120
3. 150
4. 300

### In a group of persons, 70% of the persons are male

In a group of persons, 70% of the persons are male and 30% of the persons are married. If two sevenths of males are married, what fraction of the females is single?

1. 2/7
2. 3/7
3. 2/3
4. 1/3

### The tank-full petrol in Arun's motor-cycle lasts for 10 days

The tank-full petrol in Arun's motor-cycle lasts for 10 days. If he starts using 25% more everyday, how many days will the tank-full petrol last?

1. 5
2. 6
3. 7
4. 8

### An employee is required to contribute 10% of his pay

An employee is required to contribute 10% of his pay to General Provident Fund. If he gets ₹13,500 as net pay in a month, then what is the monthly General Provident Fund contribution (assuming no other deductions)?

1. ₹ 1215
2. ₹ 1350
3. ₹ 1500
4. ₹ 1650

### A man loses 20% of his money. After spending 25% of the remainder

A man loses 20% of his money. After spending 25% of the remainder, he has ₹ 480 left. What is the amount of money he originally had?

1. ₹ 600
2. ₹ 720
3. ₹ 800
4. ₹ 840

### What is 5% of 50% of 500

What is 5% of 50% of 500?

1. 1.25
2. 12.5
3. 6.25
4. 25

### If m% of m + n% of n = 2% of (m × n)

If m% of m + n% of n = 2% of (m × n), then what percentage of m is n?

1. 25%
2. 50%
3. 75%
4. 100%

### The price of an article is ₹ 25. After two successive cuts

The price of an article is ₹ 25. After two successive cuts by the same percentage, the price becomes ₹ 20.25. If each time the cut was x%, then

1. x = 9
2. x = 10
3. x = 11
4. x = 11.5

### The radius of the base of a right circular cone is increased by 15%

The radius of the base of a right circular cone is increased by 15% keeping the height fixed. The volume of the cone will be increased by

1. 34.75%
2. 32.25%
3. 31%
4. 30%

### What is the number whose 20% is 30% of 40

What is the number whose 20% is 30% of 40?

1. 50
2. 60
3. 80
4. 90

### In a certain year, a school had 60% boys and 40% girls as students

In a certain year, a school had 60% boys and 40% girls as students. In the next five years the number of boys decreased by 10% and the number of girls increased by 10%. What is the change in total roll strength of the school in the five years?

1. 3% increase
2. 2% decrease
3. No change
4. 5% decrease

### If each of the dimensions of a rectangle is increased by 200%

If each of the dimensions of a rectangle is increased by 200%, the area is increased by

1. 300%
2. 400%
3. 600%
4. 800%

### 5/9 th part of the population in a village are males. If 30% of the males are married

5/9 th part of the population in a village are males. If 30% of the males are married, the percentage of unmarried females in the total population is

1. 20 2/9
2. 27 2/9
3. 27 7/9
4. 29 2/9

### If a% of a + b% of b = 2% of ab, then what percent of a is b

If a% of a + b% of b = 2% of ab, then what percent of a is b?

1. 50%
2. 75%
3. 100%
4. Cannot be determined

### The rabbit population in community A increases at 25% per year

The rabbit population in community A increases at 25% per year while that in community B increases at 50% per year. If the present populations of A and B are equal, what will he the ratio of the number of rabbits in community B to that in community A after 2 years?

1. 1.44
2. 1.72
3. 1.90
4. 1.26

### In a test, a candidate attempted only 8 questions and secured

In a test, a candidate attempted only 8 questions and secured 50% marks in each of the questions. If he obtained a total of 40% in the test and all questions in the test carried equal marks, how many questions were there in the test?

1. 8
2. 10
3. 15
4. 16