Move four matchsticks to the below square to form three squares?

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

Out of four images which one is the odd one out?

I am 5 letters long.
My first two tell you who I am
My first 3 could be a medicine
My last three reversed could be a young boy.
My 4th, 3rd and 2nd in that order could be a fruit drink.
If you have me you may hang me round your neck
WHAT AM I ?

This isn't your average math problem. It requires you to see beyond basic operations and identify the hidden logic that connects the numbers.

18, 46, 94, ?, 52, 61

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

There is a unique number which when multiplied by any number from 1 to 6, we will get the new number that contains the same digits only.

Can you find that number?

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

Can you find out the total number of triangles in the given figure?

You are given 2 eggs.
You have access to a 100-storey building.
Eggs can be very hard or very fragile means it may break if dropped from the first floor or may not even break if dropped from 100th floor, Both eggs are identical.
You need to figure out the highest floor of a 100-storey building an egg can be dropped without breaking.
Now the question is how many drops you need to make. You are allowed to break 2 eggs in the process