Brainteaser Puzzles | Mind Teaser | Math Logic

## Oct 11, 2007

### The Expedition (Logic Brainteaser Puzzle)

An expedition to explore the Lurgi desert is about to set off. It consists of four men and each one has enough food to last him five days. After some distance, one man gets sick and has to turn back. He takes with him just enough food to last him till he gets back to base. Then the second man does the same, and the third. How many day’s journey was the last man able to make into the desert and get back safely? (You must assume that the men only travel in units of one day and that they can give food to the others.)

Again, in order to make it more interesting, I am not giving the answer or the clue straight. Please try to give your answer in the comment box at my blog or by yahoo groups email, I’ll check it out as soon as possible, and I’ll give the clue and the answer eventually. Thx guys!!

### Chess Player (Logic Brainteaser Puzzle)

Two men played five games of chess. They each won the same number of games. How was this possible?

Again, in order to make it more interesting, I am not giving the answer or the clue straight. Please try to give your answer in the comment box at my blog or by yahoo groups email, I’ll check it out as soon as possible, and I’ll give the clue and the answer eventually. Thx guys!!

## Oct 9, 2007

### The murder (Logic Brainteaser Puzzle)

This is the hardest question so far, please try to solve it!!

One evening there was a murder in the home of married couple, their son and daughter. One of these four people murdered one of the others. One of the members of the family witnessed the crime.

The other one helped the murderer.

These are the things we know for sure:

1. The witness and the one who helped the murderer were not of the same sex.

2. The oldest person and the witness were not of the same sex.

3. The youngest person and the victim were not of the same sex.

4. The one who helped the murderer was older than the victim.

5. The father was the oldest member of the family.

6. The murderer was not the youngest member of the family.

Who was the murderer?

Clue:

Establish what we know about the youngest person first. This person cannot have been either the victim three, the helper four or the killer five. Then work out who was oldest, youngest, etc. After this draw up the various possibilities about who could have been what.

We know from (3) that the youngest person was not the victim, from (4) that the youngest person was not the helper and from (6) that the youngest person was not the killer. The youngest person can only have been the witness therefore. If we make up a chart there are now three possible combinations:

Oldest person (father) H H M

Next to oldest (mother) V M H

Next to youngest (son) M V V

Youngest (daughter) W W W

(H = Helper ; V = Victim ; M = Murderer ; W = Witness)

We can work out from (5) that the father was the oldest, from (2) that the youngest person must have been the daughter. Therefore the next to the youngest must have been the son and the next to the oldest, the mother.

Of three possibilities: the first is impossible (from (3) – the youngest person and the victim were of different sexes); the third is also impossible (from (1) – the witness and the helper were of different sexes). Therefore only the second possibility holds – and the mother was the murderess.

### The Kidnappers (Logic Brainteaser Puzzle)

When the Rajah’s daughter was kidnapped, he arrested three young men. The suspects were brought before his wise old guru.

Ravi said: ‘Gopal did it.’

Gopal said: ‘But that’s not true.’

Kushwant said: ‘It was Ravi who did it.’

Ravi said: ‘What Kushwant says next will be true.’

Gopal said: ‘What Ravi has just said is false.’

Kushwant said: ‘Ravi has made two false statements.’

The guru meditated for a few minutes before whispering the name of the guilty person in the Rajah’s ear. Which name?

Again, in order to make it more interesting, I am not giving the answer or the clue straight. Please try to give your answer in the comment box at my blog or by email, I’ll check it out as soon as possible, and I’ll give the clue and the answer eventually. Thx guys!!