Coin touches coins

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?




Similar Riddles

A research team went to a village somewhere between the jungles of Africa. Luckily for them, they reached the day when quite an interesting custom was to be performed. The custom was performed once a year as they confirmed and was performed in order to collect the taxes from every male of the region.

The taxes were to be paid in the form of grains. Everyone must pay pounds of grain equaling his respective age. This means a 20-year-old will have to pay 20 pounds of grain and a 30-year-old will pay 30 pounds of grain and so on.

The chief who collects the tax has 7 weights and a large 2-pan scale to weigh. But there is another custom that the chief can weigh only three of the seven weights.

Can you find out the weights of the seven weights? Also, what is the maximum age of the man that can be weighed for the payment of taxes?

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There is something which you can be arrested for attempting but not for successfully completing.

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What word is pronounced the same if you take away four of its five letters?

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You Throw The Outside, Cook The Inside
Eat The Outside, Throw The Inside.

What Is It?

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Can you discover the missing number in this series?

37, 10, 82
29, 11, 47
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42, ?, 15

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The more it dries, the wetter it becomes. Can you tell what it is?

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Replace each alphabet with the number (1-9) to make the below equation correct.

AB * C = DE - F = GH / I

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An office is divided into 8 cubicles. How many of the cubicles are painted if only 1/8 of the cubicles are painted?

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There is a hypothetical state between the USA and Mexico border 'Tango'.
Here 70 percent of the population have defective eyesight, 75 percent are hard of hearing, 80 percent have Nose trouble and 85 percent suffer from allergies, what percentage (at a minimum) suffer from all four ailments?

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A pack of cards has 40 cards. You are blindfolded. Out of 40, 25 cards are facing down while 15 are facing up. You have been asked to divide this pack of cards into two decks - so that each deck contains an equal number of face-up cards. Remember, you are blindfolded.

How will you do it?

Asked by Neha on 10 Jan 2026

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There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.