There’s a one-story house in which everything is yellow. Yellow walls, yellow doors, yellow furniture. What colour are the stairs?

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

I know there are two methods by using three time the same number with a plus(+) operator , you can make sum as 60.

One of them is 20+20+20.

whats the other way ?

One absent-minded ancient philosopher forgot to wind up his only clock in the house. He had no radio, TV, telephone, internet, or any other means for telling time. So he travelled on foot to his friend's place a few miles down the straight desert road. He stayed at his friend's house for the night and when he came back home, he knew how to set his clock. How did he know?

What do you see in the image below

You are given a cube that is made with the help of 10x10x10 smaller cubes summing up to a total of 1000 smaller cubes. You are asked to take off one layer of the cubes.
How many remain now?

Count the number of triangles in the picture below:

A sundial has the fewest moving parts of any timepiece. Which has the most?

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?

A finger goes in me. You fiddle with me when you're bored. The best man always has me first. What am I?