Difficulty Popularity

Mark went to visit his mother last weekend which is about 250 miles away from his home. He started 7am in the sunny morning of Saturday and found out that the road was too crowded. There were times that he has completely stationary. He reached his mother's house after lunch.

He had to return on Sunday and he had to travel through the same route again. He left the place at 7 am and found no traffic at all and reached home before lunch time enjoying a smooth drive.

What is the probability that he was at the same point at the same time on both the days he traveled?

He had to return on Sunday and he had to travel through the same route again. He left the place at 7 am and found no traffic at all and reached home before lunch time enjoying a smooth drive.

What is the probability that he was at the same point at the same time on both the days he traveled?

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Difficulty Popularity

A unique solo game of dice is being played. Two dices are thrown in each turn and the scores are taken by multiplying the numbers obtained.

Now talking about a particular game, here are the facts:

1) The score for the second roll is five more than the score for the first roll.

2) The score for the third roll is six less than the score for the second roll.

3) The score for the fourth roll is eleven more than the score for the third roll.

4) The score for the fifth roll is eight less than the score for the fourth roll.

Reading the above facts, can you tell the score for each of the five throws?
**category** :
LOGIC

Now talking about a particular game, here are the facts:

1) The score for the second roll is five more than the score for the first roll.

2) The score for the third roll is six less than the score for the second roll.

3) The score for the fourth roll is eleven more than the score for the third roll.

4) The score for the fifth roll is eight less than the score for the fourth roll.

Reading the above facts, can you tell the score for each of the five throws?

Difficulty Popularity

A couple had to take shelter in a hotel for they could not proceed their journey in the rain. Having nothing to do at all, they started playing cards. Suddenly there was a short circuit and the lights went off. The husband inverted the position of 15 cards in the deck (52 cards normal deck) and shuffled the deck.

Now he asked his wife to divide the deck into two different piles which may not be equal but both of them should have equal number of cards facing up. There was no source of light in the room and the wife was unable to see the cards.

For a certain amount of time, she thought and then divided the cards in two piles. To the husbandâ€™s astonishment, both of the piles had equal number of cards facing up.

How did she do it?
**category** :
LOGIC

Now he asked his wife to divide the deck into two different piles which may not be equal but both of them should have equal number of cards facing up. There was no source of light in the room and the wife was unable to see the cards.

For a certain amount of time, she thought and then divided the cards in two piles. To the husbandâ€™s astonishment, both of the piles had equal number of cards facing up.

How did she do it?

Difficulty Popularity

In a recreational activity, you are given four different jars of 2 liters, 4 liters, 6 liters and 8 liters respectively with an unlimited water supply. Then you are asked to measure exactly 5 liters of water using them.

How will you do it?

How will you do it?

Difficulty Popularity

You live in Dubai and had an infinite supply of oil and a 5 liters and 3 liters jar,

how would you measure exactly 4 liters (of-course in minimum numbers of step) ?

how would you measure exactly 4 liters (of-course in minimum numbers of step) ?

Difficulty Popularity

In a closed jar, there are three strawberry candies, two mango candies and five pineapple candies. You can't see inside the jar. Now, how many toffees you must take out from the jar to make sure that you have one of each flavor?
**category** :
LOGIC

Difficulty Popularity

You have been given three jars of 3 liters, 5 liters and 8 liters capacity out of which the 8 liters jar is filled completely with water. Now you have to use these three jars to divide the water into two parts of 4 liters each.

How can you do it making the least amount of transfers?
**category** :
LOGIC

How can you do it making the least amount of transfers?

Difficulty Popularity

This is a famous probability puzzle in which you have to choose the correct answer at random from the four options below.

Can you tell us whats the probability of choosing correct answer in this random manner.

1) 1/4

2) 1/2

3) 1

4) 1/4

Can you tell us whats the probability of choosing correct answer in this random manner.

1) 1/4

2) 1/2

3) 1

4) 1/4

Difficulty Popularity

You are given a set of scales and 12 marbles. The scales are of the old balance variety. That is, a small dish hangs from each end of a rod that is balanced in the middle. The device enables you to conclude either that the contents of the dishes weigh the same or that the dish that falls lower has heavier contents than the other.

The 12 marbles appear to be identical. In fact, 11 of them are identical, and one is of a different weight. Your task is to identify the unusual marble and discard it. You are allowed to use the scales three times if you wish, but no more.

Note that the unusual marble may be heavier or lighter than the others. You are asked to both identify it and determine whether it is heavy or light.
**category** :
LOGIC

The 12 marbles appear to be identical. In fact, 11 of them are identical, and one is of a different weight. Your task is to identify the unusual marble and discard it. You are allowed to use the scales three times if you wish, but no more.

Note that the unusual marble may be heavier or lighter than the others. You are asked to both identify it and determine whether it is heavy or light.

Difficulty Popularity

You can place weights on both side of weighing balance and you need to measure all weights between 1 and 1000. For example if you have weights 1 and 3,now you can measure 1,3 and 4 like earlier case, and also you can measure 2,by placing 3 on one side and 1 on the side which contain the substance to be weighed. So question again is how many minimum weights and of what denominations you need to measure all weights from 1kg to 1000kg.

Difficulty Popularity

Outside a room there are three light switches. One of switch is connected to a light bulb inside the room.

Each of the three switches can be either 'ON' or 'OFF'.

You are allowed to set each switch the way you want it and then enter the room(note: you can enter the room only once)

Your task is to then determine which switch controls the bulb ??

**category** :
LOGIC

Each of the three switches can be either 'ON' or 'OFF'.

You are allowed to set each switch the way you want it and then enter the room(note: you can enter the room only once)

Your task is to then determine which switch controls the bulb ??

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