There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

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

O T T F F S S ?

I’m orange, I wear a green hat and I sound like a parrot. What am I?

I’m tall when I’m young, and I’m short when I’m old. What am I?

Can you name an animal whose killing cannot be performed without spilling your own blood?

What does the below rebus riddle means?

The Puzzle: A girl, a boy, and a dog start walking down a road.

They start at the same time, from the same point, in the same direction.

The boy walks at 5 km/h, the girl at 6 km/h.

The dog runs from boy to girl and back again with a constant speed of 10 km/h. The dog does not slow down on the turn.
How far does the dog travel in 1 hour?

How many letters are in the alphabet?

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

"That Restaurant always remains crowded. This is the reason why nobody goes there".

Can you find a flaw in this statement?