What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

John enters a small room. The Door Closes.
When the door opens, John is in a larger room.

Explain?

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

Can you find the largest Three-digit number whose sum is 14 and whose square is less than 5,00,000?

Below, you can see some coding:
January = 1017
February = 628
March = 1335
April = 145
May = 1353
June = 1064
July = 1074
August = 186

Now deciphering the way it has been coded, can you find out how September will be coded?

Place a mathematical symbol between the numerals 5 and 9 in such a way that the resulting number is greater than 5 but smaller than 9.

It is a six-letter word.
The first four letters are me.
The second and last letters are the same.
The fourth second and last letter is payment.

Who is it?

What part of the chicken has the most feathers?

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?