A man has a barrel filled with oil that weighs 100 pounds, and then he puts something into it. Now the barrel weighs less than 100 pounds. What did he put in the barrel?

There is a box in which distinct numbered balls have been kept. You have to pick two balls randomly from the lot.

If someone is offering you a 2 to 1 odds that the numbers will be relatively prime, for example
If the balls you picked had the numbers 6 and 13, you lose $1.
If the balls you picked had the numbers 5 and 25, you win $2.

Will you accept that bet?

You have to fill the below given grid in a manner that every row and column contains the digits 1 to 6. Also, make sure that the squares that are connected with each other must contains the same digit.

Can you place six X (crosses) in below board without making three in a row in any way ?

What makes this number unique: 8,549,176,320?

In the figure, you can see nine stars. What you have to do is connect all of them by using just four line and without lifting your hand i.e. in a continuous flow.

It is always ahead of me yet I can never see it. What is it?

You can see three almost identical images below. Can you spot the odd one out from them?

I’m orange, I wear a green hat and I sound like a parrot. What am I?

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