As you can see that fifteen matches have been used to form an arrangement. What you have to do is remove any six of them to make them ten.

Why do you find that most of the buildings are deprived of the 13th floor?

Find three numbers such that

* When we multiply three numbers, we will get the prime numbers.
* The difference between the second and the first number is equal to the third and second.

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

What is the centre of gravity?

How many triangles are there in the picture below?

Your mother’s brother’s only brother-in-law is asleep on your couch. Who is asleep on your couch?

People are waiting in line to board a 100-seat aeroplane. Steve is the first person in the line. He gets on the plane but suddenly can't remember what his seat number is, so he picks a seat at random. After that, each person who gets on the plane sits in their assigned seat if it's available, otherwise, they will choose an open seat at random to sit in. The flight is full and you are last in line. What is the probability that you get to sit in your assigned seat?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see? What is it?

Can you find the odd number in the following five choices?

1) 482636
2) 259807
3) 865195
4) 104739
5) 391744