10 Trick based questions asked in UPSC Interview with answers

1. If you were to arrange all the numbers from 1 to 100, how many times would the number 5 appear in the final list?

Answer:The number 5 will appear 11 times in the final list (5, 15, 25, 35, 45, 50, 51, 52, 53, 54, and 55).

2. How can you add eight 8s to get the number 1,000?

Answer:888 + 88 + 8 + 8 + 8 = 1,000.

3. A man buys a car for $600 and sells it for $700. He then buys the same car back for $800 and sells it again for $900. How much profit or loss did he make in total?

Answer:The man made a total profit of $100 (he made $100 profit on the first sale, and another $100 profit on the second sale).

4. If a plane crashes on the border between the United States and Canada, where do you bury the survivors?

Answer:You don't bury survivors.

5. A doctor gives you 3 pills and tells you to take one every half hour. How long will the pills last?

Answer:The pills will last for 1 hour (you take the first pill, wait 30 minutes, take the second pill, wait 30 minutes, and then take the third pill).

6. A farmer has 17 sheep and all but 9 die. How many sheep does the farmer have left?

Answer:The farmer has 9 sheep left.

7. If you have two coins that add up to 30 cents, and one of them is not a nickel, what are the two coins?

Answer:The two coins are a quarter and a nickel (the other coin is not a nickel).

8. A man is pushing his car. He stops in front of a hotel and immediately knows he is bankrupt. How does he know this?

Answer:The man is playing the game of Monopoly and has just landed on the "Bankruptcy" square.

9. A man builds a house with four walls, each facing south. How is this possible?

Answer:The house is built at the South Pole, where all the walls face south.

10. A truck driver is going down a one-way street the wrong way, and passes four police officers. Yet, none of them stop him. Why not?

Answer:The truck driver is walking, not driving a truck.