What is the word or phrase?

Can you complete the sequence puzzle?

AR TA GE CA LE VI LI _

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

I am a five-letter word and comprises two different vowels and three same consonants. I am so strong that I can spoil your entire work.

Can you find out who am I?

If an electric train is travelling south, then which way is the smoke going?

Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?

Find the missing letter in the last circle logically in the given below picture.

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

We can be boring,Or interesting.
We can be long,Or short.
We can have pictures,Or just words.
Many love us,But many also hate us.
What are we?

I inserted a coin in a bottle and closed its mouth with the help of a cork. Now, I was able to take the coin out from the bottle without taking out the cork or breaking the bottle. Can you tell me how I did it?