Mind Teasers : Hardest River Crossing Puzzle

Difficulty Popularity

James Bond organizes an island party. Following are the people in the party
1. The organizer: James Bond
2. James Bond 2 supermodels: Madeleine and Lucia
3. The Richest Businessman of the town: Blofeld
4. Blofeld's 2 secretaries.
5. Mr. Hinx and his Secret Diary.

They all need to cross the river to reach the island, however, James Bond has got just one boat. Following are some rules

Rule-1 : The capacity of the is two persons.
Rule-2 : Blofeld's secretary won't stay with James Bond without Blofeld.
Rule-3: Madeleine and Lucia won't stay with the Blofeld without James Bond.
Rule-4: Mr. Hinx would never leave the Secret Diary alone.
Rule-5: Secret Diary counts as a person.
Rule-6: Only James Bond, Blofeld or Mr. Hinx can drive the boat.
Rule-7: The two supermodels Madeleine and Lucia won't stay with the Blofeld without James Bond;
Rule-8: Secretary won't stay with James Bond without their Blofeld. Rule-9: Mr.Hinx won't leave the Secret Diary alone.
category : LOGIC

Suggestions

Mind Teasers : Numbers For Buildings Problem

Difficulty Popularity

My town contains 100 buildings.
They are numbered from 1 to 100. How many 6's are used in these numbers ?
category : LOGIC

Mind Teasers : Logic Question In Maths

Difficulty Popularity

Two trains under a controlled experiment begin at a speed of 100 mph in the opposite direction in a tunnel. A supersonic bee is left in the tunnel which can fly at a speed of 1000 mph. The tunnel is 200 miles long. When the trains start running on a constant speed of 100 mph, the supersonic bee starts flying from one train towards the other. As soon as the bee reaches the second train, it starts flying back towards the first train.

If the bee keeps flying to and fro in the tunnel till the trains collide, how much distance will it have covered in total?

Mind Teasers : Popular Logical Riddle

Difficulty Popularity

A mules travels the same distance daily.
I noticed that two of his legs travels 10km and the remaining two travels 12km.
Obviously two mules legs cannot be a 2km ahead of the other 2.

The mules is perfectly normal. So how come this be true ?
category : LOGIC | TRICK

Mind Teasers : Fake Coin Brain Teaser

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?
category : LOGIC

Mind Teasers : Crossing Bridge Brain Teaser

Difficulty Popularity

Four friends need to cross a dangerous bridge at night. Unfortunately, they have only one torch and the bridge is too dangerous to cross without one. The bridge is only strong enough to support two people at a time. Not all people take the same time to cross the bridge. Times for each person: 1 min, 2 mins, 7 mins and 10 mins. What is the shortest time needed for all four of them to cross the bridge?

Mind Teasers : Spatial Trivia Physics Puzzle

Difficulty Popularity

As shown in picture, there are four gears with the following specification
* Gear A has 60 teeth
* Gear B has 40 teeth
* Gear C has 20 teeth
* Gear D has 60 teeth
* Every minute, Gear B makes 15 complete turns.

What is the relative speed of Gear A and Gear B?

Mind Teasers : Trick Interesting Maths puzzle

Difficulty Popularity

There are three cars in a racing track. The track is made forming a perfect circle and is quite wide so that at one time, multiple cars can pass through it. The car which is leading is driving at 55 MPH and the slowest car is driving at 45 MPH. The car that is in middle of these two is driving in between the two speeds. For the time being you can say that the distance between the fastest car and the middle car is x miles and it is same between the middle car and the slowest car. Also, x is not equal to 0 or 1.

The car keeps running till the leading car catches up with the slowest car and then every car stops. Given the case, do you think that at any point, the distance between any two pairs will again become x miles?

Mind Teasers : Unsolvable Problem

Difficulty Popularity

In a contest, four fruits (an apple, a banana, an orange, and a pear) have been placed in four closed boxes (one fruit per box). People may guess which fruit is in which box. 123 people participate in the contest. When the boxes are opened, it turns out that 43 people have guessed none of the fruits correctly, 39 people have guessed one fruit correctly, and 31 people have guessed two fruits correctly.
How many people have guessed three fruits correctly, and how many people have guessed four fruits correctly
category : LOGIC | RIDDLE

Mind Teasers : What Is It six letter word. Riddle

Difficulty Popularity

It's a six letter word.
The first four letter is me.
The second and last letter are the same.
The fourth second and last letter are payment.

What Is It ?

Mind Teasers : Who Am I Hot Cold Riddle

Difficulty Popularity

I am hot but if you remove first two alphabets then I will become really cold. Who am I ?

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