Brain Teasers – Part 4

Here we have come up with some more interesting brain teasers to tickle your brain. Try to solve them in the shortest time possible

1. Water Jug Puzzle from Die Hard 3

You have a five-gallon jug and a three-gallon jug, but no measuring marks on them. You need to measure out exactly four gallons of water using only these jugs. How can you do it?

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2. Who is in the photograph

A man is looking at a photograph of someone. His friend asks who it is. The man replies, “Brothers and sisters, I have none. But that man’s father is my father’s son.” Who is in the photograph?

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3. Which is the correct switch

There is a room with three light switches outside of the room. Each switch controls one of three light bulbs inside the room. You can turn the switches on and off as many times as you like, but you can only enter the room once. How can you tell which switch controls which light bulb?

Can you solve it?

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4. How can you measure 45 minutes using a rope

You have two ropes, each of which takes exactly one hour to burn from one end to the other. However, the ropes do not burn at a uniform rate. For example, half the rope might burn in the first ten minutes, and then the remaining half would take fifty minutes to burn. Using these two ropes and a lighter, how can you measure 45 minutes?

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5. 3 cuts to cut round cake into 8 equal pieces

You have a birthday cake and have to cut it into 8 equal pieces by making 3 cuts only. How do you do it?

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6. A Room With No Windows

You are in a room with no windows, doors or any exit. The only items are a mirror and a table. How do you escape?

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7. Time

Man gave one son 10 cents and another son was given 15 cents. What time is it?

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8. E

What starts with an E, ends with an E, but only contains one letter?

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9. The Prisoner

A prisoner is told, “If you tell a lie we will hang you; if you tell the truth we will shoot you.” What can he say to save himself?

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10. Balls and Balance

You have 12 balls that are identical in every way except for their weight. Eleven of the balls weigh exactly the same, but one of the balls is either heavier or lighter than the others. You also have a balance scale that can be used to weigh the balls. What is the minimum number of weighings you need to determine which ball is the odd one out and whether it is heavier or lighter than the others?

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