What is the next number in this series?

4,12,84,3612....

John is selling fruits.
He sells grapes at $30, Dates $25, and a Wolfberry $45.
At what price does he sell fig?

PS: Logical Thinking

What breaks yet never falls, and what falls yet never breaks?

Through your logical capabilities, can you make 7 an even?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

what does the below math rebus puzzle mean?

Which city is three-fifths chick two third cat and 50% goat?

One day Jenifer meets the Lion and the Tiger in the Forest of Forgetfulness. She knows that the Lion lies on Mondays, Tuesdays, and Wednesdays, and tells the truth on the other days of the week. The Tiger, on the other hand, lies on Thursdays, Fridays, and Saturdays, but tells the truth on the other days of the week. Now they make the following statements to Jenifer:

Lion: Yesterday was one of my lying days.

Tiger: Yesterday was one of my lying days too.

What day is it?

f you were running a race, and you passed the person in 2nd place, what place would you be in now?

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