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?

You see me once in June, twice in November, and not at all in May. What am I?

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

What does this rebus puzzle means ?

Four men were in a boat on the lake. The boat turns over, and all four men sink to the bottom of the lake, yet not a single man got wet! Why?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

The day after tomorrow will be three days before Tuesday. Can you find out what is today?

How many times in a given day, minutes and hour clock comes in a straight line ?

What can you catch but never throw?

Two friends were stuck in a cottage. They had nothing to do and thus they started playing cards. Suddenly the power went off and Friend 1 inverted the position of 15 cards in the normal deck of 52 cards and shuffled it. Now he asked Friend 2 to divide the cards into two piles (need not be equal) with equal number of cards facing up. The room was quite dark and Friend 2 could not see the cards. He thinks for a while and then divides the cards in two piles.

On checking, the count of cards facing up is same in both the piles. How could Friend 2 have done it ?