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### 30september2010

Ant Problem

Three ants are going up a hill, one behind the other. The last ant then says to the other ants, 'There is an ant behind me!'' How come?

### 29september2010

Egg Problem

how can you tell a raw egg from a hard-boiled egg ?

### 28september2010

Monkey Truth Problem

There are people and strange monkeys on this island, and you can not tell who is who (Edit: untill you understand what they said - see below). They speak either only the truth or only lies.
Who are the following two guys?
A: B is a lying monkey. I am human.
B: A is telling the truth.

### 27september2010

Pool Problem

A swimming pool has four faucets. The first can fill the entire pool with water in two days, the second in three days, the third in four days, and the last one can fill the pool in 6 hours.
How long will it take to fill the pool using all 4 faucets together?

### 24september2010

Problem

Lavesh was piloting a plane behind a car but was never able to overtake it. Why?

### 23september2010

Magnet Problem

You are in a room with no metal objects except for two iron rods. Only one of them is a magnet.
How can you identify which one is a magnet?

### 22september2010

Birthday Problem

The day before yesterday I was 25 and the next year I will be 28. This is true only one day in a year. What day is my birthday?

### 21september2010

Mathematical Symbol Problem

Find a 9-digit number, which you will gradually round off starting with units, then tenth, hundred etc., until you get to the last numeral, which you do not round off. The rounding alternates (up, down, up ...). After rounding off 8 times, the final number is 500000000. The original number is commensurable by 6 and 7, all the numbers from 1 to 9 are used, and after rounding four times the sum of the not rounded numerals equals 24.

### 20september2010

Mathematical Symbol Problem

Using four sevens (7) and a one (1) create the number 100. Except the five numerals you can use the usual mathematical operations (+, -, x, , root and brackets ()

### 19september2010

Mathematical Trick Teaser Problem

Rectify the following equality 101 - 102 = 1 by moving just one digit.

### 18september2010

Mathematical Roundoff Problem
Find a 9-digit number, which you will gradually round off starting with units, then tenth, hundred etc., until you get to the last numeral, which you do not round off. The rounding alternates (up, down, up ...). After rounding off 8 times, the final number is 500000000. The original number is commensurable by 6 and 7, all the numbers from 1 to 9 are used, and after rounding four times the sum of the not rounded numerals equals 24.

### 17september2010

Mathematical Number Problem

What 5-digit number has the following property? If we put numeral 1 in front of the number, we get a number three times smaller, than if we put the numeral 1 behind this number.

### 16september2010

Time By cents Problem

man gave one son 10 cents and another son was given 15 cents. What time is it?

### 15september2010

Mathematical Problem

What is the four digit number in which the first digit is one-third the second, the third is the sum of the first two, and the last is three times the second?

### 14september2010

Cross the river Athlete-Coach puzzle

There are three Athletes (Lavesh, Tarun and Harish) and their individual Coaches (Meher, Meenaxi and priyanka) standing on the shore.
No Coach trusts their Athlete to be near any other Coach unless they are also with them.
There is a boat that can hold a maximum of two persons.
How can the six people get across the river?

### 13september2010

Triplets Puzzle
Three Brothers are identical triplets. The oldest by minutes is Lavesh, and Lavesh always tells anyone the truth. The next oldest is Tarun, and Tarun always will tell anyone a lie. Harish is the youngest of the three. He sometimes lies and sometimes tells the truth.

Ganpat, an old friend of the family's, came over one day and as usual he didn't know who was who, so he asked each of them one question.

Ganpat asked the brother that was sitting on the left, "Which brother is in the middle of you three?" and the answer he received was, "Oh, that's Lavesh."
Ganpat then asked the brother in the middle, "What is your name?" The response given was, "I'm Harish."
Ganpat turned to the brother on the right, then asked, "Who is that in the middle?" The brother then replied, "He is Tarun."
Who was who?

### 12september2010

Mathematical Fraction Problem

Can you arrange 9 numerals - 1, 2, 3, 4, 5, 6, 7, 8 and 9 - (using each numeral just once) above and below a division line, to create a fraction equaling to 1/3 (one third)

### 11september2010

Mathematical Symbol Problem

What mathematical symbol can be placed between 5 and 9, to get a number greater than 5 and smaller than 9?

### 10september2010

Burn The Strings (Difficulty Level : Medium)

You have two strings whose only known property is that when you light one end of either string it takes exactly one hour to burn. The rate at which the strings will burn is completely random and each string is different.
How do you measure 45 minutes?

### 9september2010

Gallon-2 (Difficulty Level : Medium)

You are mixing cement and the recipe calls for five gallons of water. You have a garden hose giving you all the water you need. The problem is that you only have a four gallon bucket and a seven gallon bucket and nether has graduation marks. Find a method to measure five gallons.

### 8september2010

The Islanders (Difficulty Level : Medium)

There are two beautiful yet remote islands in the south pacific. The Islanders born on one island always tell the truth, and the Islanders from the other island always lie.
You are on one of the islands, and meet three Islanders. You ask the first which island they are from in the most appropriate Polynesian tongue, and he indicates that the other two Islanders are from the same Island. You ask the second Islander the same question, and he also indicates that the other two Islanders are from the same island.
Can you guess what the third Islander will answer to the same question?

### 7september2010

Fill the gallon (Difficulty Level : Medium)

You have a three gallon and a five gallon measuring device. You wish to measure out four gallons.

### 6september2010

Old Classical :The missing dollar (Difficulty Level : Medium)

Three men in a cafe order a meal the total cost of which is \$15. They each contribute \$5. The waiter takes the money to the chef who recognizes the three as friends and asks the waiter to return \$5 to the men.
The waiter is not only poor at mathematics
but dishonest and instead of going to the trouble of splitting the \$5 between the three he simply gives them \$1 each and pockets the remaining \$2 for himself.
Now, each of the men effectively paid \$4, the total paid is therefore \$12. Add the \$2 in the waiters pocket and this comes to \$14.....where has the other \$1 gone from the original \$15?

### 5september2010

Boxes with the wrong labels (Difficulty Level : Easy)

There are three boxes. One is labeled "APPLES" another is labeled "ORANGES". The last one is labeled "APPLES AND ORANGES". You know that each is labeled incorrectly. You may ask me to pick one fruit from one box which you choose.
How can you label the boxes correctly?

### 4september2010

The Living Door (Difficulty Level : Medium)
You are trapped in a room with two doors. One leads to certain death and the other leads to freedom. You don't know which is which.
There are two robots guarding the doors. They will let you choose one door but upon doing so you must go through it.
You can, however, ask one robot one question. The problem is one robot always tells the truth ,the other always lies and you don't know which is which.
What is the question you ask?

### 3september2010

There is something about Mary (Difficulty Level : Easy)

Mary's mum has four children.
The first child is called April.
The second May.
The third June.
What is the name of the fourth child?

### 2september2010

Old-Classical Frog-Well (Difficulty Level : Easy)

A frog is at the bottom of a 30 meter well. Each day he summons enough energy for one 3 meter leap up the well. Exhausted, he then hangs there for the rest of the day. At night, while he is asleep, he slips 2 meters backwards. How many days does it take him to escape from the well?

For Solution: