HCF of two numbers is 16. Their LCM is 960. Find the product of the numbers.

The correct answer is A: 15,360. HCF×LCM = product of numbers. 16×960 = 15,360.

A train 240m long passes a platform 160m long in 20 seconds. What is the train's speed?

The correct answer is A: 72 km/h. Total distance = 240 + 160 = 400m. Speed = 400/20 = 20 m/s = 72 km/h

The downstream speed of a boat is 20 km/h and upstream speed is 12 km/h. What is the boat's speed in still water?

The correct answer is B: 16 km/h. Boat speed = (Downstream + Upstream) / 2 = (20 + 12) / 2 = 32 / 2 = 16 km/h.

The LCM of two numbers is 60 and their HCF is 4. If one number is 20, find the other.

The correct answer is A: 12. Using HCF × LCM = Product of numbers: 4 × 60 = 20 × other. Therefore, other = 240 ÷ 20 = 12.

A train 180 m long crosses a bridge 420 m long in 30 seconds. Find the train's speed in km/h.

The correct answer is C: 72 km/h. Distance = Train length + Bridge length = 180 + 420 = 600 m. Speed = 600/30 = 20 m/s = 20×3.6 = 72 km/h

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Quantitative aptitude questions for competitive exams

48 Q 7 Topics Take Mock Test

Difficulty: All Easy Medium Hard 11–20 of 48

Topics in Quantitative Aptitude

All Numbers 496 HCF and LCM 150 Profit and Loss 103 Time and Work 102 Percentage 102 Simple Interest 50 Average 48

Q.11 Easy Percentage

A product costs ₹1,200 to manufacture. The company wants a profit margin of 40%. What should be the selling price?

A ₹1,680

B ₹1,720

C ₹1,800

D ₹1,920

Correct Answer: A. ₹1,680

EXPLANATION

SP = CP + Profit = 1,200 + (40% of 1,200) = 1,200 + 480 = ₹1,680

Test

Q.12 Easy Percentage

A student scored 72% in Math, 68% in Science, and 80% in English. What is the average percentage?

A 72%

B 73.33%

C 74%

D 75%

Correct Answer: B. 73.33%

EXPLANATION

Average percentage = (72 + 68 + 80)/3 = 220/3 = 73.33%

Test

Q.13 Easy Percentage

In 2024, a company's revenue was ₹50 crore. In 2025, it is projected to be 35% more. What is the projected 2025 revenue?

A ₹67.5 crore

B ₹70 crore

C ₹65 crore

D ₹72.5 crore

Correct Answer: A. ₹67.5 crore

EXPLANATION

Projected revenue = 50 × 1.35 = ₹67.5 crore

Test

Q.14 Easy Percentage

The price of petrol increased from ₹95 to ₹114 per liter in 2024. What is the percentage increase?

A 18%

B 20%

C 22%

D 25%

Correct Answer: B. 20%

EXPLANATION

Percentage increase = [(114-95)/95] × 100 = (19/95) × 100 = 20%

Test

Q.15 Easy Percentage

A trader buys an item for ₹800 and sells it at a loss of 12.5%. What is the selling price?

A ₹700

B ₹750

C ₹675

D ₹725

Correct Answer: A. ₹700

EXPLANATION

SP = CP × (1 - loss%) = 800 × (1 - 0.125) = 800 × 0.875 = ₹700

Test

Q.16 Easy Percentage

A vendor buys apples at ₹30 per kg and sells at ₹42 per kg. What is his profit percentage?

A 30%

B 40%

C 50%

D 35%

Correct Answer: B. 40%

EXPLANATION

Profit% = [(42-30)/30] × 100 = (12/30) × 100 = 40%

Test

Q.17 Easy Percentage

If the population of a city increases by 5% annually, what will be the population after 2 years if the current population is 10,00,000?

A 11,02,500

B 11,05,000

C 11,10,250

D 11,15,000

Correct Answer: A. 11,02,500

EXPLANATION

Population after 2 years = 10,00,000 × (1.05)² = 10,00,000 × 1.1025 = 11,02,500

Test

Q.18 Easy Percentage

A's salary is 40% more than B's salary. If their combined salary is ₹84,000, what is B's salary?

A ₹35,000

B ₹45,000

C ₹50,000

D ₹40,000

Correct Answer: A. ₹35,000

EXPLANATION

Let B's salary = x. A's salary = 1.4x. x + 1.4x = 84,000. 2.4x = 84,000. x = ₹35,000

Test

Q.19 Easy Percentage

Two successive discounts of 20% and 15% are given on an article. What is the effective discount percentage?

A 32%

B 35%

C 38%

D 40%

Correct Answer: A. 32%

EXPLANATION

Effective discount = 20 + 15 - (20×15)/100 = 35 - 3 = 32%

Test

Q.20 Easy Percentage

A shopkeeper sells an item at ₹450 after giving a 10% discount on the marked price. What is the marked price?

A ₹500

B ₹550

C ₹480

D ₹520

Correct Answer: A. ₹500

EXPLANATION

If SP = ₹450 and discount = 10%, then MP × 0.9 = 450. MP = 450/0.9 = ₹500

Test

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