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I have mixed 13 decks of cards.

What is the minimum number of cards must be taken out from the above mixed cards to guarantee at least one 'four of a kind'.

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A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

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At the local model boat club, four friends were talking about their boats.

There were a total of eight boats, two in each colour, red, green, blue and yellow. Each friend owned two boats. No friend had two boats of the same colour.

Alan didn't have a yellow boat. Brian didn't have a red boat, but did have a green one. One of the friends had a yellow boat and a blue boat and another friend had a green boat and a blue boat. Charles had a yellow boat. Darren had a blue boat, but didn't have a green one.

Can you work out which friend had which coloured boats?

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Mr. Rawat wishes to cross a the Sahara desert.

It requires 6 days to cross.

One man can only carry enough food and water for 4 days.

What is the fewest number of other men required to help carry enough food for Mr. Rawat to cross ?

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I purchased a awesome ice cream cone having 5 different flavor scoop.

Five favors are pistachio, mint-chip, strawberry, marshmallow and raspberry

I will give u some clues so that you can figure out the order of flavors from bottom to top.

1. The bottom flavor of the cone has 10 letters.

2. The marshmallow scoop is at between pistachio and the mint-chip scoop.

3. marshmallow is above the raspberry scoop but below the mint-chip scoop.

So can you figure out the flavor of ice cream in order from bottom to top

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Like an usual car, my new i10 car has 5 wheels(2 front + 2 Rear + 1 spare).

Rear wheel of car will wear out after 21000 kilometers and front wheel will wear out after 29000 kilometers.

What is the maximum distance i can cover assuming changing of wheels is not an issues.

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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?

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King Charles want to send the diamond ring to his girlfriend securely.He got multiple locks and their corresponding keys.His girl friend does not have any keys to these locks and if he send the key without a lock , the key can be copied in the way.How can charles send the ring to his girl friend securely .

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My sock drawer has 26 blue socks, 13 pink socks, 33 green socks, and 12 red socks, how many socks would I have to pull out in the dark to be sure i had a matching pair?

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using four eights (8) and a one (1) and one mathematical symbol , create the number 100