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

You bought me for dinner but never eat me. What am I?

I have four wings but can't fly.
I express no emotions.
I am found on the exact spot every time you look.
I keep toiling away with a little sound.

Do you know what am I?

The host of a game show offers the guest a choice of three doors. Behind one is an expensive car, but behind the other two are goats.
After you have chosen one door, he reveals one of the other two doors behind which is a goat (he wouldn't reveal a car).

Now he gives you the chance to switch to the other unrevealed door or stay at your initial choice. You will then get what is behind that door.

You cannot hear the goats from behind the doors, or in any way know which door has the prize.

Should you stay, or switch, or doesn't it matter?

1 dollar = 100 cent
= 10 cent x 10 cent
= 1/10 dollar x 1/10 dollar
= 1/100 dollar
= 1 cent

=> 1 dollar = 1 cent

solve this tricky problem?

What is red and smells like blue paint?

How many times can you subtract the number two from the number fifty?

Find the smallest sentence with all the English alphabet.

There is a certain crime, that if it is attempted, is punishable, but if it is committed, is not punishable. What is the crime?

What is full of holes but still holds water?