Showing 551–560 of 654 questions
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%
A bag contains 5 red balls, 7 blue balls, and 8 green balls. What is the probability of drawing a red ball?
A
1/4
B
1/5
C
7/20
D
5/20
Explanation:
Total balls = 5 + 7 + 8 = 20. Probability of red = 5/20 = 1/4
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
Find the missing number in the series: 1, 1, 2, 3, 5, 8, ?, 21
Explanation:
This is the Fibonacci series where each number is the sum of the previous two. 5 + 8 = 13
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
Complete the analogy: Clock is to Time as Thermometer is to ?
A
Heat
B
Temperature
C
Weather
D
Scale
Correct Answer:
B. Temperature
Explanation:
Clock measures time. Thermometer measures temperature. The relationship is the same.
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.
