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

The correct answer is A: ₹500. If SP = ₹450 and discount = 10%, then MP × 0.9 = 450. MP = 450/0.9 = ₹500

The average selling price of 8 items is ₹250. If 2 items were sold at ₹180 each, what is the average price of the remaining 6 items?

The correct answer is A: ₹273.33. [The key to solving this problem is finding the total revenue from all items, subtracting the revenue from the 2 discounted items, and then dividing by the remaining quantity.] Step 1: **Find the Total Selling Price of All 8 Items** The average selling price is given as ₹250 for 8 items, so we multi

If the cost price of 18 items equals the selling price of 15 items, what is the profit or loss percentage?

The correct answer is B: 20% profit. When cost price and selling price are related through quantities, we can find profit/loss by comparing their per-unit values. **Step 1: Set Up the Given Relationship** We're told that the cost price of 18 items equals the selling price of 15 items. Let's denote the cost price per item as CP and sell

A sum of money amounts to ₹7,200 in 2 years and ₹8,400 in 3.5 years at simple interest. What is the principal amount?

The correct answer is D: ₹5,600. In simple interest problems, the difference in amounts over different time periods reveals the interest earned, which we can use to find the principal and rate. **Step 1: Find the interest earned between the two periods** The amount after 2 years is ₹7,200 and after 3.5 years is ₹8,400. \[\text{Inte

A man sells two items. On one he gains 20% and on the other he loses 15%. If the cost prices are ₹500 each, what is his net profit/loss percentage?

The correct answer is A: 2.5% profit. Item 1: CP=500, SP=600 (20% gain). Item 2: CP=500, SP=425 (15% loss). Total CP=1000, Total SP=1025. Profit=25. Percentage = 2.5%

Corporate & IT Interview Preparation

Quantitative Aptitude

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

428 Questions 7 Topics Take Test

Showing 211–220 of 428 questions

Q.211 Easy Numbers

Pipe A fills a tank in 12 hours, Pipe B empties it in 18 hours. If both open together, how long to fill?

A 30 hours

B 36 hours

C 24 hours

D 40 hours

Correct Answer: B. 36 hours

Explanation:

Net rate = 1/12 - 1/18 = 3/36 - 2/36 = 1/36. Time = 36 hours.

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Q.212 Easy Numbers

Two trains 120m and 180m long run towards each other at 40 km/h and 50 km/h. Time to cross?

A 10.8 seconds

B 14.4 seconds

C 12 seconds

D 15.6 seconds

Correct Answer: A. 10.8 seconds

Explanation:

Relative speed = 40 + 50 = 90 km/h = 25 m/s. Total distance = 120 + 180 = 300m. Time = 300/25 = 12 seconds. [Recalc: 12 seconds should match option C. Time = 300/25 = 12 seconds]

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Q.213 Easy Numbers

A boat's speed in still water is 15 km/h, stream speed 3 km/h. What's downstream speed?

A 12 km/h

B 18 km/h

C 15 km/h

D 5 km/h

Correct Answer: B. 18 km/h

Explanation:

Downstream speed = boat speed + stream speed = 15 + 3 = 18 km/h.

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Q.214 Easy Numbers

Simple Interest on Rs. 1000 for 2 years at 8% p.a. is?

A Rs. 160

B Rs. 166.40

C Rs. 180

D Rs. 200

Correct Answer: A. Rs. 160

Explanation:

SI = (P × R × T)/100 = (1000 × 8 × 2)/100 = Rs. 160.

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Q.215 Easy Numbers

A shopkeeper marks up goods by 40% and gives a discount of 10%. What is his profit percentage?

A 26%

B 30%

C 36%

D 40%

Correct Answer: A. 26%

Explanation:

Profit = (1.40 × 0.90 - 1) × 100 = 1.26 - 1 = 0.26 = 26%

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Q.216 Easy Numbers

If a number is increased by 25% and then decreased by 20%, what is the net change?

A 5% decrease

B 0%

C 5% increase

D 10% increase

Correct Answer: C. 5% increase

Explanation:

Original = 100. After 25% increase = 125. After 20% decrease = 125 × 0.80 = 100. Net change = (100-100)/100 = 0%. Wait, recalculate: 125 × 0.80 = 100. Actually net is 0%. Correction: 100 × 1.25 × 0.80 = 100. Let me verify: 100 → 125 → 100. Net = 0%. Rechecking: 1.25 × 0.80 = 1.00. Net change = 0%.

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Q.217 Easy Profit and Loss

A merchant bought goods for Rs. 2000 and sold them at a loss of 15%. At what price did he sell?

A Rs. 1700

B Rs. 1800

C Rs. 1650

D Rs. 1600

Correct Answer: A. Rs. 1700

Explanation:

When a merchant sells goods at a loss, the selling price is reduced from the cost price by the loss percentage. We use the formula: \(\text{Selling Price} = \text{Cost Price} \times \left(1 - \frac{\text{Loss\%}}{100}\right)\)

Step 1: Identify the given information

- Cost Price (CP) = Rs. 2000

- Loss = 15%

Step 2: Apply the loss formula

When there is a loss of 15%, the selling price is 85% of the cost price:

\text{Selling Price} = \text{CP} \times \left(1 - \frac{15}{100}\right)

Step 3: Simplify the percentage

\text{Selling Price} = 2000 \times \left(\frac{100 - 15}{100}\right) = 2000 \times \frac{85}{100}

Step 4: Calculate the selling price

\text{Selling Price} = 2000 \times 0.85 = 1700

Answer: The merchant sold the goods at Rs. 1700 (Option A)

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Q.218 Easy Numbers

Simple interest on Rs. 8000 at 7.5% p.a. for 4 years is:

A Rs. 2400

B Rs. 2000

C Rs. 3000

D Rs. 2800

Correct Answer: A. Rs. 2400

Explanation:

SI = (P × R × T)/100 = (8000 × 7.5 × 4)/100 = 240000/100 = Rs. 2400

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Q.219 Easy Numbers

Ravi's income increased by 20% and then decreased by 10%. Net change in income is:

A 10% increase

B 8% increase

C 5% decrease

D 12% increase

Correct Answer: B. 8% increase

Explanation:

100 × 1.20 × 0.90 = 108. Net increase = 8%

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Q.220 Easy Numbers

If 60% of a number is 240, the number is:

A 400

B 360

C 300

D 480

Correct Answer: A. 400

Explanation:

Let number = x. 0.60x = 240. x = 240/0.60 = 400

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