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Mind Teasers : Hard Probability Question

Difficulty Popularity

Imagine a situation in your mind. You are playing a coin game with your friend where you have pre-decided the sequence that you require. The coin is fair and you both keep tossing it till you get the desired sequence.

The predefined sequence for you is H T H.
The predefined sequence for your friend is H T T.

You keep tossing the coin and writing it down till you get the required sequence. You play several games and at the end, the one with the average score less will win.

Game 1 result:
You: H T T H T H
Your score: 6
Your friend: H T H H H T H H T T
Your friends' score: 10

Game 2 result:
You: T T H T T H H T H
Your score: 9
Your friend: T T H H T H T T
Your friends' score: 8

Game 3 result:
You: T T H H T H
Your score: 6
Your friend: H H T H T T
Your friends' score: 6

Now, after playing 3 games, your score is 7 (average) and your friend's score is 8 (average). Assume that you keep playing like this for several many games, what of the following outcomes are you expecting at the end?
a) Your average score is lower and you win.
b) Your friend's average score is lower and he wins.
c) Both have equal scores and the match ties.

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By Admin
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Mind Teasers : Floating Fish MatchStick Riddle

Difficulty Popularity

As shown in the image below, group of fishes are swimming from left to right. By moving just three matchsticks, can you make fishes from right to left?

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Mind Teasers : One Move Chess Puzzle

Difficulty Popularity

Can you win this chess game in one move.

* You are playing with white and its ur turn

By Admin
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Mind Teasers : Passcode Puzzle

Difficulty Popularity

Shruti's daughter Arshika need to be picked from the school every day.
Shruti asks one of her colleagues to pick her from school. Shruti devised a password mechanism to confirm that Arshika goes with the correct person only.
The password on Monday was SAM16.
The password on Wednesday was HRW39.

What will the password for Friday?


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Mind Teasers : Out Of Box Thinking Puzzle

Difficulty Popularity

n a hotel, a man was sleeping when he heard a knock on the door. He shifted the blanket and stepped down from the bed. He waked to the door and opened it to find a stranger standing outside.
Upon opening the gate, that stranger said, "Pardon me, I must have made a mistake. I thought this was my room."
The stranger then walked the corridor and climbed down the stairs. The man closed the door and immediately called the security. He asked them to arrest that stranger immediately.
Why did he asked them to arrest that stranger? What made him suspicious?

By Admin
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Mind Teasers : Tricky Maths Expression

Difficulty Popularity

By using the numbers 8,5 1 and 1 exactly once and with the help of basic operation (+, -, /, *), Can you form an expression with a value of 10?

Note: Parentheses are allowed

Mind Teasers : Survive The Fire Brain Teaser

Difficulty Popularity

Isaac Newton is stranded on an island covered in forest.

One day, when the wind is blowing from the west, lightning strikes the west end of the island and sets fire to the forest. The fire is very violent, burning everything in its path, and without intervention the fire will burn the whole island, killing the man in the process.

There are cliffs around the island, so he cannot jump off.

How can the Isaac Newton survive the fire? (There are no buckets or any other means to put out the fire)

  • Views : 40k+
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Mind Teasers : Logic Interview Riddle

Difficulty Popularity

prinka and tanu organized a small kitty party at home. They purchased a barrel of fruit juice.

Tanu told to prinka 'I bet this barrel of fruit juice is more than half full'.
'No, its less than half full' prinka replied.

I don't have any measuring instrument and without removing fruit juice from it , how can i determine which of us is right ?

  • Views : 50k+
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Mind Teasers : Logical Maths Gold Bar Brain Teaser

Difficulty Popularity

A worker is to perform work for you for seven straight days. In return for his work, you will pay him 1/7th of a bar of gold per day. The worker requires a daily payment of 1/7th of the bar of gold. What and where are the fewest number of cuts to the bar of gold that will allow you to pay him 1/7th each day?

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Mind Teasers : Simple Logic Shape Riddle

Difficulty Popularity

Can you place ten balls in five lines in a manner that each line has exactly four balls in it ?

By Admin
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Mind Teasers : Supernatural - Who Are We Riddle

Difficulty Popularity

We are the most popular hunters of the world.
We fight against hell.
We kill criminal vampires.
We kill demons.
We always do it together as we are the brother.

Who are we?

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