What is more useful when it is broken?

A large container is kept in open under the rain. Every passing hour, the water collected inside the container becomes double what it was.

In ten hours, the container is filled completely. Can you calculate how long would it have taken to be filled in half?

What can you catch but never throw?

Can you complete the sequence?

192, 021, 222, 324, 252, 627, 2__, 9__?

13 decks of cards have been mixed. What is the minimum number of cards that must be taken out from the above-mixed cards to guarantee at least one 'four of a kind?

John and Jenni are a married couple. They have two kids, one of them is a girl. Assume safely that the probability of each gender is 1/2.
What is the probability that the other kid is also a girl?

Hint: It is not 1/2 as you would first think.

Count the number of lines in the image below ?

81 x 9 = 801. What must you do to make the this equation true?

Why did Buffon take the goal with him after every Juventus match?

As you can see that fifteen matches have been used to form an arrangement. What you have to do is remove any six of them to make them ten.