Showing 1–10 of 26 questions
Two pipes A and B can fill a tank in 12 hours and 18 hours respectively. How long will it take to fill the tank if both pipes are opened together?
A
6.5 hours
B
7.2 hours
C
7.5 hours
D
8 hours
Correct Answer:
B. 7.2 hours
Explanation:
Rate of A = 1/12, Rate of B = 1/18. Combined rate = 1/12 + 1/18 = 5/36. Time = 36/5 = 7.2 hours
If a number is divided by 7, it leaves a remainder of 4. If the same number is divided by 11, what could be the remainder?
A
3
B
5
C
7
D
Cannot be determined
Correct Answer:
D. Cannot be determined
Explanation:
The number could be 11, 18, 25, 32, etc. (of form 7k+4). When divided by 11, remainders vary: 11→0, 18→7, 25→3, 32→10. Cannot determine uniquely.
A person covers 60% of a journey by train, 30% by bus, and the remaining distance of 20 km by walk. What is the total distance?
A
100 km
B
120 km
C
150 km
D
200 km
Correct Answer:
D. 200 km
Explanation:
Train + Bus = 60% + 30% = 90%. Walk = 10% = 20 km. Total = 20/0.10 = 200 km
Three numbers are in the ratio 2:3:5. If their sum is 100, what is the largest number?
Explanation:
Let numbers be 2x, 3x, 5x. Sum = 2x + 3x + 5x = 10x = 100. x = 10. Largest = 5x = 50
A number when divided by 12 leaves remainder 5. What is the remainder when the number is divided by 4?
Explanation:
Number = 12k + 5. When divided by 4: 12k + 5 = 4(3k) + 4 + 1 = 4(3k+1) + 1. Remainder = 1
If 5 workers can build a wall in 12 days, how many days will 10 workers take?
A
4 days
B
6 days
C
8 days
D
10 days
Correct Answer:
B. 6 days
Explanation:
Work is inversely proportional to number of workers. (5 × 12) = (10 × x), so x = 6 days
If a person buys 10 items at Rs. 50 each and sells them at Rs. 60 each, what is the profit percentage?
Explanation:
Cost Price = 10 × 50 = 500. Selling Price = 10 × 60 = 600. Profit = 100. Profit% = (100/500) × 100 = 20%
If all roses are flowers and some flowers are red, then which statement is true?
A
All roses are red
B
Some roses are red
C
No roses are red
D
Cannot be determined
Correct Answer:
D. Cannot be determined
Explanation:
Roses are a subset of flowers, but we don't know which flowers are red. Some red flowers might not be roses.
If ROSE is coded as 4567, then PETAL is coded as?
A
98214
B
89214
C
98124
D
89124
Explanation:
R=4, O=5, S=6, E=7. Following alphabet position: P=1(9), E=7(8), T=2(9→2 with shift), A=1, L=4. PETAL = 89214
Select the word that is most similar in meaning to 'Benign':
A
Harmful
B
Friendly
C
Strict
D
Complex
Correct Answer:
B. Friendly
Explanation:
Benign means harmless, kind, or gentle. Friendly is the closest synonym
