There is a box full of marbles,
all but two are blue,
all but two are green,
and all but two are red.

How many marbles are in the box?

Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?

What is the next number in the series?

15 29 56 108 208 ?

How can you spell "White of an egg" in one word?
Hint: I know you can spell coke, poke, and joke.

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

A beggar on the street can make one cigarette out of every 6 cigarette butts he finds. After one whole day of searching and checking public ashtrays the beggar finds a total of 72 cigarette butts. How many cigarettes can he make and smoke from the butts he found?

In the image below, you can see two glasses and two matchsticks.You need to move four matchsticks in such a manner that the crosses come inside the glasses. Note: you cannot move the crossed.

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

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?

By what process could you make a 'Tea-Table' into food?