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ACADIFY · BRAIN CHALLENGE 04

Brain Teasers
Think Beyond the Obvious.

Tricky questions. Unexpected answers. Logical challenges. Test your reasoning, problem-solving, and attention to detail with these 10 brain teasers.

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THINK · QUESTION · SOLVE

Can you solve all 10 challenges?

Read every question carefully. Some require mathematical reasoning, while others test how well you think beyond the obvious.

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🧠 10 Questions ⏱️ About 10 Minutes 🎯 Logic & Reasoning

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1. A bat and a ball cost ₹110 together. The bat costs ₹100 more than the ball. How much does the ball cost?
2. A pond has lily pads that double in number every day. If the pond is completely covered on Day 48, on which day was it half covered?
3. Three notebooks and two pens cost ₹100. Two notebooks and three pens cost ₹80. What is the cost of one notebook?
4. A farmer has 25 sheep. All but 8 die. How many sheep are still alive?
5. What five-letter English word becomes "shorter" when you add two letters to it?
6. You enter a dark room with one match. Inside are a candle, an oil lamp, and a fireplace. What should you light first?
7. A farmer must take a fox, a chicken, and a bag of grain across a river. The boat can carry the farmer and only one of the three at a time. The fox cannot be left alone with the chicken, and the chicken cannot be left alone with the grain. What should the farmer take across first?
8. Think of a number. Double it, add 10, divide the result by 2, and then subtract 5. The final answer is 12. What was the original number?
9. A drawer contains 10 black socks and 10 blue socks. It is completely dark, so you cannot see the colour of any sock. What is the minimum number of socks you must take out to guarantee a matching pair of the same colour?
10. I am a three-digit number. My tens digit is 3 more than my units digit. My hundreds digit is twice my units digit. The sum of all three digits is 15. What number am I?

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