What is the difference between compound interest and simple interest on Rs. 20000 at 10% per annum for 2 years?

The correct answer is B: Rs. 200. SI = (20000 × 10 × 2)/100 = 4000. CI = 20000(1.1)² - 20000 = 24200 - 20000 = 4200. Difference = 200.

Find the largest power of 5 that divides 100!

The correct answer is C: 24. Using Legendre's formula: floor(100/5) + floor(100/25) + floor(100/125) = 20 + 4 + 0 = 24.

Which of the following is a perfect square?

The correct answer is B: 169. This question asks us to identify which number is a perfect square (a number that equals an integer multiplied by itself). Step 1: Understand Perfect Squares A perfect square is a number that can be expressed as n × n where n is an integer. $$\text{Perfect Square} = n^2$$ Step 2: Check Each Option T

A can do a work in 10 days, B can do it in 15 days, and C can do it in 30 days. How long will they take working together?

The correct answer is A: 5 days. Combined rate = 1/10 + 1/15 + 1/30 = 3/30 + 2/30 + 1/30 = 6/30 = 1/5. Time = 5 days

A number is increased by 30%, then decreased by 20%. Net change is what percent?

The correct answer is A: 4%. Let number = 100. After +30% = 130. After -20% of 130 = 130 × 0.8 = 104. Net increase = 4%

State PSC Exam Preparation — BPSC, UPPSC, MPPSC

State Exam — Quantitative Aptitude

BPSC · UPPSC · MPPSC · RPSC · TNPSC — State PSC Exam Practice

428 Questions 7 Topics Take Test

Showing 381–390 of 428 questions

Q.381 Easy Percentage

A man's salary increased from ₹30,000 to ₹36,000. What is the percentage increase?

A15%

B18%

C20%

D22%

Correct Answer: C. 20%

Explanation:

Increase = 6000. Percentage = (6000/30000) × 100 = 20%.

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Q.382 Easy Percentage

If the cost price is ₹2000 and profit is 15%, what is the selling price?

A₹2200

B₹2250

C₹2300

D₹2350

Correct Answer: C. ₹2300

Explanation:

SP = 2000 × 1.15 = 2300.

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Q.383 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

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Q.384 Easy Percentage

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

A32%

B35%

C38%

D40%

Correct Answer: A. 32%

Explanation:

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

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Q.385 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

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Q.386 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?

A11,02,500

B11,05,000

C11,10,250

D11,15,000

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

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Q.387 Easy Percentage

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

A30%

B40%

C50%

D35%

Correct Answer: B. 40%

Explanation:

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

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Q.388 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

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Q.389 Easy Percentage

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

A18%

B20%

C22%

D25%

Correct Answer: B. 20%

Explanation:

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

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Q.390 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

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