Can you solve the photo plexer logic ?

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

O T T F F S S ?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

All of the flowers I have are orchids except two. All of the flowers I have are hibiscuses except two. All of the flowers I have are roses except two.

Can you tell me how many flowers I have?

Look at the picture and find out which square is not linked with any of the other squares.

what does the below rebus means?

I am the largest in my family of fifty.
The youngest of our family lives separately from the rest of the family and so do I.
I am regarded as harsh and tough.
I am so large, you cut me in two equal halves,
each half would still be larger than the second largest member of the family.
Who am I?

The day after tomorrow will be three days before Tuesday. Can you find out what is today?

The following four words might seem abrupt to you. But you can make them meaningful by just adding vowels.
RDSH
GGPLNT
TMT
NN

Hint: All of them are vegetables.

You find yourself in a strange place guarded by two guards.One of the guard always say truth while other always lies.You don't know the identity of the two.You can ask only one question to go out from there. What should you ask?