Complete the table series riddle by finding the number that can replace "??".

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

John, a 5-year-old boy, was really fond of the chocolates. He asked his Mother to give him some money to buy his favourite chocolates. His Mother gave him $45. He went to the shopkeeper and asked, "How much is one chocolate for?". The shopkeeper said $3 for one chocolate. Also, if you give me the wrappers of three chocolates, I will give you one for the exchange.
In total, how much chocolate could John eat?

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

What has 13 hearts but no other organs?

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?

I don't get anymore wetter, no matter how much rain falls on me.

Decode The Message

carrot fiasco nephew spring rabbit
Sonata Tailor Bureau Legacy Corona
travel bikini object happen soften
picnic option waited effigy adverb
report accuse animal shriek esteem
oyster

In a rainy season, one day 3 huge ladies walked under a normal-sized umbrella.
The umbrella is not huge enough to accommodate all 3 ladies yet not a single lady got wet. Why?

What has a bottom at the top?