What kind of storm is always in a rush?

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

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.

If we add four times the age of John four years from now to five times his age five years from now we get ten times his current age.

How old will John be two years from now?

There are nine letters in the below-given diagram. You have to form a nine-letter word using these letters.

Count the number of triangles in the below picture?

What is the coolest letter in the alphabet?

I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?

There are three boxes which are labeled as Rs100, Rs150, and Rs200. One box contains two notes of Rs. 50. The second box contains one note of Rs50 and one note of Rs100 The third box contains two Rs. 100 notes. All boxes are labeled incorrectly.

What is the minimum number of boxes you must check in order to label all boxes correctly?

How can you throw a ball as hard as you can and have it come back to you even if it doesn't hit anything there is nothing attached to it and no one else catches or throws it.