How many triangles can you find in this given picture?

If,

A + B = C
D - C = A
E - B = C

Based on the above equations, find out the answer for:

D + F = ?

Imagine you are in a room with no windows or doors. How will you get out?

Find the missing number in the sequence below:

A man calls his dog from the opposite side of a river. The dog crosses the river without a bridge or a boat and manages to not get wet. How is this possible?

How many minutes are there in Feb 2017?

Note: The shortest answer is the correct answer.

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.

Take number 1000 and then add 20 to it.
Now add 1000 one more time.
Now add 30.
Now add 1000 one more time.
Now add 40.
Now add 1000 one more time.
Now add 10.

What is the total?

How could a baby fall out of a twenty-story building onto the ground and live?

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?