Quantitative Aptitude - MCQ Practice Questions

Step 1: Discount = 15% of ₹800 = 0.15 × 800 = ₹120.

Step 2: Selling Price = Marked Price - Discount = 800 - 120 = ₹680.

Therefore, option A is correct.

Step 1: Increase in price = ₹50 - ₹40 = ₹10.

Step 2: Percentage increase = (Increase/Original Price) × 100 = ($\frac{10}{40}$) × 100 = 25%.

Therefore, option C is correct.

Step 1: Percentage = (Marks obtained/Total marks) × 100 = ($\frac{72}{120}$) × 100.

Step 2: = 0.6 × 100 = 60%.

Therefore, option B is correct.

Step 1: Profit = 20% of ₹250 = 0.20 × 250 = ₹50.

Step 2: Selling Price = Cost Price + Profit = 250 + 50 = ₹300.

Therefore, option B is correct.

Step 1: Population increase = 8% of 50,000 = 0.08 × 50,000 = 4,000.

Step 2: Current population = 50,000 + 4,000 = 54,000.

Therefore, option B is correct.

Step 1: Reduction in production = 18% of 5,000 = 0.18 × 5,000 = 900 units.

Step 2: Current production = 5,000 - 900 = 4,100 units per day.

Therefore, option C is correct.

To find the time saved, we need to calculate the original travel time and the new travel time after the speed increase, then find the difference.

Step 1: Calculate original travel time

Using the formula $\text{Time}=\frac{\text{Distance}}{\text{Speed}}$:

Step 2: Find the new speed after 20% increase

A 20% increase means the new speed is:

Alternatively: ${\text{Speed}}_{\text{new}}=60\times 1.20=72\text{ km/h}$

Step 3: Calculate new travel time at increased speed

Step 4: Find time saved

Converting $\frac{1}{3}$ hour to minutes: $\frac{1}{3}\times 60=20\text{ minutes}$

Therefore, time saved = 1 hour 20 minutes

Answer: 1 hour 20 minute (Option A)

Let original price = 100. After 15% increase: 115. After 15% decrease: 115 × 0.85 = 97.75. Change = 97.75 - 100 = -2.25. Percentage change = -2.25%.

To find the total salary, we need to determine what percentage is saved, then use it to calculate the full amount.

Step 1: Find the percentage spent

The man spends money on food and rent:

Step 2: Find the percentage saved

Since total salary = 100%, the remaining amount is saved:

Step 3: Set up the equation

If 30% of his salary equals ₹3000:

Step 4: Solve for total salary

Verification: 40% of ₹10,000 = ₹4,000 (food); 30% of ₹10,000 = ₹3,000 (rent); Remaining = ₹10,000 − ₹7,000 = ₹3,000 ✓

**Answer: The total monthly salary is $₹10,000$ (Option A)**

Let original price = 100. After 20% increase: 120. After 10% increase: 120 × 1.10 = 132. Total increase = 32%.

Let MP = x. SP = x × (1 - 0.12) = 0.88x = 440. x = $\frac{440}{0}$.88 = 500.

Increase = 30,000 - 25,000 = 5,000. Percentage = (5,$\frac{000}{25}$,000) × 100 = 20%.

Average = (65 + 75)/2 = $\frac{140}{2}$ = 70%.

New production = 5000 × (1 - 0.30) = 5000 × 0.70 = 3500 units.

Total parts = 3 + 2 = 5. Girls = $\frac{2}{5}$ = 0.4 = 40%.

To find the new workforce after an 18% increase, we calculate the increase amount and add it to the original number of employees.

Step 1: Identify the increase percentage

The company increased its workforce by 18%, meaning we need to find what 18% of 500 employees represents.

Step 2: Calculate the number of new employees added

Step 3: Find the total workforce in 2025

Add the increase to the original number of employees:

Alternatively (using multiplier method):

A 18% increase means the new total is $100\%+18\%=118\%$ of the original:

Answer: The company now has 590 employees (Option A)

Let CP = 100. MP = 140. SP = 140 × 0.75 = 105. Profit = 5%.

New salary = 50,000 × 1.12 = 56,000.

30% of x = 90, so x = 300. 50% of 300 = 150.

After 15% increase: 1000 × 1.15 = 1150. After 10% decrease: 1150 × 0.9 = 1035.