Problems on Numbers for Competitive Exam Preparation

Problems on Numbers

Q. A man buys a bicycle for $300 and sells it for $360. What is his profit percentage?

A. 15%
B. 20%
C. 25%
D. 30%

Solution

Profit = Selling Price - Cost Price = 360 - 300 = $60. Profit Percentage = (Profit / Cost Price) * 100 = (60 / 300) * 100 = 20%.

Correct Answer: B — 20%

Learn More →

Q. A man can complete a work in 10 days. If he works for 6 days, what fraction of the work is left?

A. 1/5
B. 1/3
C. 2/5
D. 1/2

Solution

Work done in 6 days = 6/10 = 3/5. Work left = 1 - 3/5 = 2/5.

Correct Answer: C — 2/5

Learn More →

Q. A person bought a bicycle for $300 and sold it for $360. What is the percentage profit?

A. 20%
B. 25%
C. 30%
D. 15%

Solution

Profit = Selling Price - Cost Price = 360 - 300 = $60. Percentage profit = (Profit / Cost Price) × 100 = (60 / 300) × 100 = 20%.

Correct Answer: B — 25%

Learn More →

Q. A product is sold for $240 after a discount of 20%. What was the marked price?

A. $300
B. $280
C. $250
D. $320

Solution

Let the marked price be x. Then, selling price = x - 20% of x = 0.8x. Given selling price = $240, we have 0.8x = 240. Therefore, x = 240 / 0.8 = $300.

Correct Answer: A — $300

Learn More →

Q. A student scored 80% in Mathematics and 70% in Science. If the weightage of Mathematics is 60% and Science is 40%, what is the overall percentage?

A. 76%
B. 78%
C. 80%
D. 74%

Solution

Overall percentage = (80% × 0.6) + (70% × 0.4) = 48% + 28% = 76%.

Correct Answer: B — 78%

Learn More →

Q. If 5 workers can complete a task in 20 days, how many days will it take for 10 workers to complete the same task?

A. 10 days
B. 15 days
C. 20 days
D. 25 days

Solution

Work done is inversely proportional to the number of workers. If 5 workers take 20 days, then 10 workers will take 20/2 = 10 days.

Correct Answer: A — 10 days

Learn More →

Q. If a person scores 80% in an exam and the passing percentage is 50%, how much more percentage does he need to increase his score to reach 90%?

A. 5%
B. 10%
C. 15%
D. 20%

Solution

To increase from 80% to 90%, he needs an increase of 90% - 80% = 10%.

Correct Answer: B — 10%

Learn More →

Q. If a person scores 80% in an exam and the passing percentage is 50%, what is the percentage of marks above the passing percentage?

A. 30%
B. 20%
C. 40%
D. 10%

Solution

Percentage above passing = 80% - 50% = 30%.

Correct Answer: A — 30%

Learn More →

Q. If a product is sold for $150 after a discount of 25%, what was the marked price?

A. $200
B. $180
C. $160
D. $220

Solution

Let the marked price be x. Then, selling price = x - 25% of x = 0.75x. Given selling price = $150, we have 0.75x = 150, x = 150 / 0.75 = $200.

Correct Answer: A — $200

Learn More →

Q. If the ratio of boys to girls in a class is 2:3 and there are 30 students in total, how many boys are there?

A. 12
B. 18
C. 15
D. 10

Solution

Let the number of boys be 2x and girls be 3x. Then, 2x + 3x = 30, which gives 5x = 30. Therefore, x = 6. Number of boys = 2x = 2 * 6 = 12.

Correct Answer: A — 12

Learn More →

Showing 1 to 10 of 10 (1 Pages)

Problems on Numbers

On a scale of 0–10, how likely are you to recommend The Soulshift Academy?