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

I have 50 feet long of cloth, I need to create 50 handkerchiefs each size of 1 foot. I take one minute to cut a 1-foot handkerchief. So how long will it take to cut 50 handkerchiefs?

In the picture given below, can you find out which digit will take place of the question mark?

Which five letter word can be added at the end of below word to form a
valid word?

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There is a circular car race track of 10km. There are two cars, Car A and Car B. And they are at the exact opposite end to each other. At Time T(0), Both cars move toward each other at a constant speed of 100 m/seconds. As we know both cars are at the same speed they will always be the exact opposite to each other.
Note, at the center, there is a bug which starts flying towards Car A at time T(0). When the bug reaches car B, it turns back and starts moving towards the car A. The speed of bug is 1m/second. After 5 hours all three stop moving.
What is the total distance covered by the bug?

The King of a distant land had heard that Birbal was one of the wisest men in the East and so desired to meet Birbal. He sent Birbal an invitation to visit his country.

In due course, Birbal arrived in the distant kingdom. When he entered the palace he was flabbergasted to find not one but six kings seated there. All looked alike. All were dressed in kingly robes. Who was the real king?

The very next moment he got his answer. Confidently, he approached the king and bowed to him.

How did Birbal know who was the real king?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

Where do fish keep their money?

Lifeless eyes on my smiling face and watch your child's sleeping place. In their dreams they hold me tight. What am I?