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Coin Riddles With Answers 1 : Tricky Probability Interview Puzzle
Difficulty ★★★☆☆        Popularity ★★★★★

I have two coins.
* One of the coin is a faulty coin having tail on both side of it.
* The other coin is a perfect coin (heads on side and tail on other).

I blind fold myself and pick a coin and put the coin on table. The face of coin towards the sky is tail.

What is the probability that other side is also tail ?
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Coin Riddles With Answers 2 : Logical Thinking Riddle
Difficulty ★★☆☆☆        Popularity ★★★★★

I have 100 coins in my wallet.

What is the minimum number of coin(s), i would be required in order to make sure each coin touched exactly three other coins.
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Coin Riddles With Answers 3 : Challenging Logic Puzzle
Difficulty ★★★☆☆        Popularity ★★★★☆

In front of you, there are 9 coins. They all look absolutely identical, but one of the coins is fake. However, you know that the fake coin is lighter than the rest, and in front of you is a balance scale. What is the least number of weightings you can use to find the counterfeit coin?
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Coin Riddles With Answers 4 : Smart Maths Bet Puzzle
Difficulty ★★★☆☆        Popularity ★★★☆☆

Two friends were betting. One said to the other, “The coin will be flipped twenty times and each time the coin lands on head, I will give you \$2 and each time it lands on tale, you will give me \$3.” After flipping the coin for twenty times not a single penny was exchanged among them.

How many times did the coin land on heads ?

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Coin Riddles With Answers 5 : Coin Riddle
Difficulty ★★☆☆☆        Popularity ★★☆☆☆

If you were to put a coin into an empty bottle and then insert a cork into the neck, how could you remove the coin without taking out the cork or breaking the bottle?
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