Replace the question mark with the number below given a simple math problem.

Outside a massage parlour, there is a board that reads
"I only massage those who do not massage themselves."

Reading the above statement, does the masseur massage himself?

What has a ring but no finger?

What's the only room from which no one can enter or leave

Fate has decided that you will only be pleased to meet me when you need me

Maybe that is why, when I am working, I start working

However annoying I may be to the regulars, the little ones are always inspired

I will always be waiting if you try to reach me

How many of you can guess my name, let me see

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

Can you decipher the below rebus?

PBLUESAISNUERSES

How many times in a given day, minutes and hour clock comes in a straight line ?

There are forty elephants and they have forty-fore heads. How can this be possible?

Which Burger Is Different in below image?