I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

Identify the hidden meaning behind this picture?

You are given with the following sum. Each of the letters can be decoded as a digit. If we tell you that D = 5, then can you solve it entirely?

DONALD
+GERALD
=ROBERT

I am the fastest animal but cannot climb the tree. What am I?

I am quite hot but become too cold if you remove the first two letters. What am I?

10+10 and 11+11 can give you the same answer.

Explain how?

It belongs to you, but other people use it more than you do. What is it?

Queen Elizabeth organised a royal party.

To Avoid uninvited guest royal family set a password.
Jack (an uninvited person) plan to enter the party. He stand nearby the door.

First guest comes, the security person said 'twelve' and guest replied with six.
Second guest comes , the security person said 'six' and guest replied with 'three'.

Jack thought is enough and he walked to the entry point. The security person said 'eight' , Jack replied smilingly 'four'.
He was immediately thrown out of the party. why ?

For an extra income, John decided to work at a Hotel for one hour daily. The manager offers him that they will pay him $11 after every 11 days.
However, John offered a different proposition to the manager. The offers stand as:
He will be paid just a penny on his first day.
Two pence will be paid on the second day,
Four pence will be paid on the third day.
And so on till the 11th day.

Should the Hotel manager accept his offer?

Solve The below Equation:

ALFA + BETA + GAMA = DELTA