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

What is the next number in this series?

4,12,84,3612....

In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?

What always comes into a house through the keyhole?

John left on a horse on Thursday , was gone for two days, and came back on Thursday after completing his work. How did that happen?

You can win me and lose me but never buy me
You can not eat me and never want to part with me
I can make you cry or bring you joy
I am not a machine and definitely not a toy
You keep me but i am not forever just yours
You might find me in a case or on a shelf next to a vase
I am hard and i am tall if you bump me i am sure to fall
I am made of different materials and am at many events
If your lucky and fight hard I might be yours
What am I ?

I am an eight letter word and I am a computer terminology.
The second, third and fourth letters make an animal.
The fourth, fifth, sixth, seventh and eighth letters make a weapon.
The first, second, third and fourth letters can be taken as an outcome of any exam.
The fifth, sixth, seventh and eighth letter combine to form a high end typing software.

Can you tell who am I ?

A man says, "Brothers and sisters, have I none, but that man's father is my father's son." Who is that man?

I have holes on the top and bottom. I have holes on my left and on my right. And I have holes in the middle, yet I still hold water. What am I?

In one of the popular batman series movie "Batman Forever", there was a riddle that goes like "Tear me off and then scratch my head and I was red then and now I am back. Who am I?