What does below pictogram mean?

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

In the addition below, all digits have been replaced by letters. Equal letters represent equal digits and different letters represent different digits.
ABCABA
BBDCAA
ABEABB
ABDBAA
------- +
AAFGBDH
What does the complete addition look like in digits?

Our product and our sum always give the same answer. Who are we?

Can you move 2 matchsticks to form four equal sized squares.

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

A woman lives in a Tall building thirty-six floors high and served by several elevators which stop at each floor going up and down. Each morning she leaves her apartment and goes to one of the elevators. Whichever one she takes is three times more likely to be going up than down. Why?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

Cristina leaves home and then she makes exactly 3 left turns and returns home where she found 2 girls wearing the mask.

Who are these two masked girls?

A man is looking at a photograph of someone. His friend asks who it is. The man replies, “Brothers and sisters, I have none. But that man’s father is my father’s son.” Who was in the photograph?