A train travels at 60 km/h for 2 hours, then at 80 km/h for 3 hours. What is the average speed?
Total distance = 60×2 + 80×3 = 120 + 240 = 360 km. Total time = 5 hours. Average speed = 5360 = 72 km/h
If 5 workers can complete a project in 12 days, how many days will 8 workers take?
Work is constant. 5 workers × 12 days = 8 workers × x days. x = (5×12)/8 = 860 = 7.5 days
The ratio of boys to girls in a class is 3:2. If there are 30 students, how many are girls?
Total parts = 3 + 2 = 5. Girls = (52) × 30 = 12
If the cost price of an item is ₹500 and profit is 20%, what is the selling price?
SP = CP + Profit = 500 + (20% of 500) = 500 + 100 = ₹600
Find the missing number: 16, 25, 36, 49, ?
These are perfect squares: 4², 5², 6², 7², 8² = 16, 25, 36, 49, 64
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A merchant bought an item for ₹2000 and sold it for ₹2400. What is the profit percentage?
Profit = 2400 - 2000 = 400. Profit % = (2000400) × 100 = 20%
Which word is the odd one out? Metaphor, Simile, Irony, Noun
Metaphor, Simile, and Irony are all figures of speech. Noun is a part of speech (grammatical category), making it the odd one.
Find the odd one out: 121, 144, 169, 196, 215
121=11², 144=12², 169=13², 196=14² are perfect squares. 215 is not a perfect square.
What does 'Ephemeral' mean?
Ephemeral means lasting for a very short time; transitory.
How many times does the letter 'e' appear in the word 'independence'?
i-n-d-e-p-e-n-d-e-n-c-e. The letter 'e' appears at positions 4, 6, 9, and 12 = 4 times
Fill in the blank: The _____ of the novel was unexpected and thrilling.
'Climax' is the turning point or the most exciting part of a story. 'Climate' refers to weather patterns.
What does the prefix 'un-' typically mean in English?
'Un-' is a prefix meaning 'not' or the opposite of something (unhappy = not happy).
In a BFS (Breadth-First Search), what data structure is used?
BFS uses a Queue (FIFO) to explore nodes level by level. DFS uses a Stack (LIFO).
What is the result of 1 XOR 1?
XOR (exclusive OR) returns 1 only when bits are different. 1 XOR 1 = 0 because both bits are the same.
What is the time complexity of finding the median in a sorted array?
In a sorted array, median is at index n/2, which is accessed in constant time O(1).
What is the purpose of a load balancer?
A load balancer distributes network traffic across multiple servers to improve reliability and responsiveness.
