A shepherd had 18 sheep, out of which, all but ten died.

Can you tell us how many sheep was he left with?

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

See the given image carefully. What you have to do is move the blue checkers in the position of the black checkers and vice versa. You are only allowed to move the checker to an adjacent empty space. Do it in the least possible moves.

In the image given, you can find several triangles. Can you count them all?

I know a nine-letter word having only one vowel.
Do you ?

A frog is at the bottom of a 30-meter well. Each day he summons enough energy for one 3-meter leap up the well. Exhausted, he then hangs there for the rest of the day. At night, while he is asleep, he slips 2 meters backwards. How many days does it take him to escape from the well?

Count the number of triangles in the below picture?

During an experiment, a guy throws a bouncy ball from a 100 feet tall building. The ball has a specific characteristic. Every time it hits the ground, it bounces up halfway.

How many bounces do you think the ball will make before it comes to a stop ?

John is looking at Jenifer, but Jenifer is looking at Jacob. John is married, but Jacob is not.

Is a married person looking at an unmarried person ?

Can you find out which number multiplied by itself will give the output as 12345678987654321?