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?

In the addition below, all digits have been replaced by letters. Equal letters represent equal digits and different letters represent different digits.
ABCABA
BBDCAA
ABEABB
ABDBAA
------- +
AAFGBDH
What does the complete addition look like in digits?

Can you find out the total number of triangles in the given figure?

In a concert, Christina is performing a dance show with her group.
At 10:00, she and her crew were dancing in an absolutely straight line. At that time Christina was standing in 4th position from both the front and back end of the row.

What was the size of her crew?

2, 3, 5, 9, 17, _ What is the next number in the sequence?

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

Can you replace the question mark with the correct number in the below table sequence?

There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?

What demands an answer, but asks no questions

Do you know of a place where the wind blows south and then suddenly shifts direction towards the north?