What does the below rebus riddle means?

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

Count the number of triangles in the picture below:

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

Let's play a word game. Following are some meaningless words that can be completed by adding random letters on either side of the word.

For example, the word "rdo" can be formed into "pardon".

Using the same technique, can you complete the given words?
ecalc
airb
rinci
tibac
uidel
gorit
igna
eyho

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

There was an aeroplane crash, every single person died, but two people survived. How is this possible?

What is the next number?

77, 49, 36, 18 ?

On a magical land of Mexico , all the animal in the land are rational.

There are 10 tigers and one goat.
Tiger can eat goat but since it's a magical land , the tiger who eats the goat , turns into goat and then can be eaten by the remaining tiger(s).

If we leave them for some time then how many goat and tiger will be there , when we come back ?