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?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

A word I know has six letters it contains, remove one letter and 12 remain. What is it?

Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M

A guy in his thirties is found dead in a forest. The shocking thing about the body is that he is wearing his swimming trunks snorkel and a facemask.

For your information, the nearest lake is some 10 miles away and the sea is hundreds of miles away.

How did he die then?

Twenty frogs are sitting on a log floating on the surface of a river. Two of them decide to jump off into the water.

How many frogs are there on the log at this moment?

Can you count the number of blocks in the picture below?

Find the missing number in the image below.

In a picnic session, a footballer was practicing. During his play, he busted lips and ears and broke ribs and thighs. However, he was still able to play a professional match on the very next day.



How can this be possible?

Count the number of triangles in the below picture?