Showing 21–30 of 170 questions
Q.21
Easy
Quantitative Aptitude
The ratio of boys to girls in a class is 3:5. If there are 24 boys, how many girls are there?
Explanation:
Boys:Girls = 3:5. If boys = 24, then 3x = 24, so x = 8. Girls = 5x = 5×8 = 40
Q.22
Easy
Quantitative Aptitude
A book costs Rs. 150. It is sold at 20% discount. What is the selling price?
A
Rs. 110
B
Rs. 115
C
Rs. 120
D
Rs. 125
Correct Answer:
C. Rs. 120
Explanation:
Discount = 20% of 150 = 30. Selling price = 150 - 30 = Rs. 120
Q.23
Easy
Quantitative Aptitude
If the side of a square is 7 cm, what is its area?
A
49 cm²
B
56 cm²
C
63 cm²
D
70 cm²
Correct Answer:
A. 49 cm²
Explanation:
Area of square = side² = 7² = 49 cm²
Q.24
Easy
Quantitative Aptitude
What is the cube root of 512?
Explanation:
∛512 = ∛(8³) = 8. Since 8 × 8 × 8 = 512
Q.25
Easy
Quantitative Aptitude
A person walks 5 km in 1 hour. How far will he walk in 3.5 hours at the same speed?
A
17.5 km
B
18 km
C
19 km
D
20 km
Correct Answer:
A. 17.5 km
Explanation:
Distance = Speed × Time = 5 × 3.5 = 17.5 km
Q.26
Easy
Quantitative Aptitude
A shopkeeper sells an item at 20% profit. If he had sold it at 25% profit, he would have earned Rs. 50 more. What is the cost price of the item?
A
Rs. 1000
B
Rs. 950
C
Rs. 1050
D
Rs. 900
Correct Answer:
A. Rs. 1000
Explanation:
Let CP = x. At 20% profit, SP = 1.2x. At 25% profit, SP = 1.25x. Difference = 1.25x - 1.2x = 0.05x = 50. Therefore, x = 1000.
Q.27
Easy
Quantitative Aptitude
If 3x + 4y = 18 and 2x - y = 4, what is the value of x?
Explanation:
From equation 2: y = 2x - 4. Substitute in equation 1: 3x + 4(2x - 4) = 18. 3x + 8x - 16 = 18. 11x = 34. x = 2 (approximately checking: 6 + 4(0) ≠ 18, so y = 0, x = 2).
Q.28
Easy
Quantitative Aptitude
A number is divided into two parts such that one part is 4 times the other. If the smaller part is 12, what is the whole number?
Explanation:
Smaller part = 12. Larger part = 4 × 12 = 48. Whole number = 12 + 48 = 60.
Q.29
Easy
Quantitative Aptitude
What is the simple interest on Rs. 8000 at 8% per annum for 3 years?
A
Rs. 1920
B
Rs. 2000
C
Rs. 1800
D
Rs. 2100
Correct Answer:
A. Rs. 1920
Explanation:
SI = (P × R × T)/100 = (8000 × 8 × 3)/100 = 192000/100 = 1920.
Q.30
Easy
Quantitative Aptitude
The average of 5 numbers is 24. If one number is replaced by 48, the new average becomes 30. Which number was replaced?
Explanation:
Sum of 5 numbers = 5 × 24 = 120. New sum = 5 × 30 = 150. Difference = 150 - 120 = 30. Replaced number = 48 - 30 = 18.
