- A box has 100 blue balls, 50 red balls, 50 black balls. 25% of blue balls and 50% of red balls are taken a way. Percentage of black balls at present is

- 25%
- 40%
- 50%
- 100/3%

### Answer is d

2. If 80% of a number added to 80 gives the result as the number itself, then the number is

- 300
- 500
- 200
- 400

### Answer is d

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3. Two numbers are respectively 25% and 20% less than a third number. What percent is the 1st number of the 2nd number?

- 75%
- 93.75%
- 5%
- 80%

### Answer is b

4. 18% of which number is equal to 12% of 75?

- 100
- 3/2
- 50
- 2

### Answer is c

5. 1% of 1% of 25% of 1000 is

- 0.0025
- 0.000025
- 0.025
- 0.25

### Answer is **c**

Read More: Percentage Concepts