Three numbers are in ratio 2:3:4 with HCF = 5. What is their LCM?

The correct answer is B: 60. When three numbers are in a given ratio, we can express them using a common factor. The HCF (Highest Common Factor) is that common factor, and we use it to find the actual numbers. **Step 1: Express the numbers in terms of the common factor** Since the numbers are in ratio \(2:3:4\) and their HCF is

A product's price increased by 25%, then decreased by 20%. What is the net change?

The correct answer is B: +5%. Let original price = 100. After 25% increase = 125. After 20% decrease = 125 × 80/100 = 100. Net = +5% gain

The HCF and LCM of two numbers are 15 and 360 respectively. If one number is 45, find the other number.

The correct answer is A: 120. Using formula: HCF × LCM = Product of two numbers. 15 × 360 = 45 × x. Therefore x = 5400/45 = 120

A number when divided by 8 leaves remainder 5. Which of the following could be the number?

The correct answer is A: 29. We need a number of the form 8k + 5. Check: 29 = 8(3) + 5 = 24 + 5. ✓

A man walks 5 km/h and covers a distance in 6 hours. If he walks at 6 km/h, how much time saved?

The correct answer is B: 1 hour. Distance = 5×6 = 30 km. New time = 30/6 = 5 hours. Time saved = 6-5 = 1 hour.

Corporate & IT Interview Preparation

Quantitative Aptitude

Aptitude · Reasoning · English · CS — Corporate & Campus Interview Prep

428 Questions 7 Topics Take Test

Showing 201–210 of 428 questions

Q.201 Easy Numbers

A shopkeeper marks an item 40% above the cost price. If he gives a discount of 15% on the marked price, what is his profit percentage?

A 19%

B 25%

C 15%

D 22%

Correct Answer: A. 19%

Explanation:

Let CP = 100. MP = 140. After 15% discount, SP = 140 × 0.85 = 119. Profit = 19%

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Q.202 Easy Numbers

A train travels 240 km in 4 hours. If its speed is increased by 20%, how much distance will it cover in 5 hours?

A 300 km

B 320 km

C 360 km

D 400 km

Correct Answer: C. 360 km

Explanation:

Original speed = 240/4 = 60 km/h. New speed = 60 × 1.2 = 72 km/h. Distance in 5 hours = 72 × 5 = 360 km

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Q.203 Easy Numbers

A person invests Rs. 5000 at 12% p.a. compound interest for 2 years. What is the final amount?

A Rs. 6272

B Rs. 6280

C Rs. 6300

D Rs. 6400

Correct Answer: B. Rs. 6280

Explanation:

A = P(1 + r/100)^n = 5000(1.12)^2 = 5000 × 1.2544 = 6272

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Q.204 Easy Numbers

The ratio of profit to cost price is 3:5. What is the profit percentage?

A 40%

B 50%

C 60%

D 75%

Correct Answer: C. 60%

Explanation:

If CP = 5, Profit = 3. Profit% = (3/5) × 100 = 60%

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Q.205 Easy Numbers

Simple Interest on Rs. 6000 at 8% p.a. for 2.5 years is?

A Rs. 960

B Rs. 1000

C Rs. 1200

D Rs. 1500

Correct Answer: C. Rs. 1200

Explanation:

SI = (P × R × T)/100 = (6000 × 8 × 2.5)/100 = 1200

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Q.206 Easy Numbers

A number is increased by 20% and then decreased by 20%. What is the net change?

A No change

B 4% decrease

C 4% increase

D 5% decrease

Correct Answer: B. 4% decrease

Explanation:

Let number = 100. After 20% increase = 120. After 20% decrease = 120 × 0.8 = 96. Net decrease = 4%

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Q.207 Easy Numbers

If 60% of a number equals 180, what is 75% of that number?

A 225

B 240

C 250

D 280

Correct Answer: A. 225

Explanation:

Number = 180/0.6 = 300. 75% of 300 = 225

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Q.208 Easy Numbers

A number is increased by 30%, then decreased by 20%. What is the net percentage change?

A 4% increase

B 10% increase

C 4% decrease

D 10% decrease

Correct Answer: A. 4% increase

Explanation:

Let number = 100. After 30% increase: 130. After 20% decrease: 130 × 0.8 = 104. Net change = 4% increase.

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Q.209 Easy Numbers

A shopkeeper sells an item at Rs. 480 with 20% profit. What is the cost price?

A Rs. 350

B Rs. 400

C Rs. 360

D Rs. 420

Correct Answer: B. Rs. 400

Explanation:

SP = CP × (1 + profit%). 480 = CP × 1.2. CP = 480/1.2 = Rs. 400.

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Q.210 Easy Numbers

A can complete a work in 15 days, B in 20 days. How many days will they take working together?

A 6 days

B 8 days

C 8.57 days

D 7.5 days

Correct Answer: C. 8.57 days

Explanation:

A's work rate = 1/15, B's rate = 1/20. Combined = 1/15 + 1/20 = 7/60. Time = 60/7 ≈ 8.57 days.

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