Showing 1–10 of 28 questions
Two pipes A and B can fill a tank in 12 hours and 18 hours respectively. If both pipes are opened together, how long will it take to fill the tank?
A
6.5 hours
B
7.2 hours
C
8.5 hours
D
9 hours
Correct Answer:
B. 7.2 hours
Explanation:
Rate of A = 1/12 per hour. Rate of B = 1/18 per hour. Combined rate = 1/12 + 1/18 = 3/36 + 2/36 = 5/36. Time = 36/5 = 7.2 hours
A shopkeeper marks up goods by 50% and gives a discount of 20%. What is his profit percentage?
Explanation:
Let CP = 100. Marked Price = 150. After 20% discount: SP = 150 × 0.8 = 120. Profit = 20%
If a sequence is 2, 5, 10, 17, 26, what is the next number?
Explanation:
Differences: 3, 5, 7, 9... next difference is 11. So 26 + 11 = 37
A man's age is 3 times his son's age. After 10 years, his age will be 2 times his son's age. What is the son's current age?
A
8 years
B
10 years
C
12 years
D
15 years
Correct Answer:
B. 10 years
Explanation:
Let son's age = x. Man's age = 3x. After 10 years: 3x + 10 = 2(x + 10). 3x + 10 = 2x + 20. x = 10
If (a + b)² = 64 and ab = 15, what is a² + b²?
Explanation:
(a + b)² = a² + 2ab + b². 64 = a² + b² + 30. a² + b² = 34
In a class, 60% students passed in Math, 70% passed in Science, and 50% passed in both. What percentage of students failed in both subjects?
Explanation:
Passed in at least one = 60 + 70 - 50 = 80%. Failed in both = 100 - 80 = 20%
Two persons A and B invest Rs. 2000 and Rs. 3000 respectively in a business. If the profit is Rs. 5000, how much profit does A get?
A
Rs. 2000
B
Rs. 2500
C
Rs. 3000
D
Rs. 3500
Correct Answer:
A. Rs. 2000
Explanation:
Ratio = 2000:3000 = 2:3. A's share = (2/5) × 5000 = Rs. 2000
If all birds can fly and all eagles are birds, then all eagles can fly. This is an example of which type of reasoning?
A
Inductive reasoning
B
Deductive reasoning
C
Abductive reasoning
D
Analogical reasoning
Correct Answer:
B. Deductive reasoning
Explanation:
This follows a logical structure (syllogism) from general premise to specific conclusion, which is deductive reasoning.
Which option follows the logical pattern? 2-4-6, 3-6-9, 4-8-12, 5-?-?
A
10-15
B
10-20
C
15-20
D
10-25
Explanation:
Pattern: Each set is n, 2n, 3n. For 5, it should be 5, 10, 15
If APPLE is coded as 1-16-16-12-5, how is ORANGE coded?
A
15-18-1-14-7-5
B
15-18-1-13-7-5
C
15-17-2-14-7-5
D
14-18-1-14-7-5
Correct Answer:
A. 15-18-1-14-7-5
Explanation:
Each letter is coded by its position in the alphabet. O=15, R=18, A=1, N=14, G=7, E=5
