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

I am never scared but became petrified and can’t live in a house but would die to make one. What am I?

I left my campsite and hiked south for 3 miles. Then I turned east and hiked for 3 miles. I then turned north and hiked for 3 miles, at which time I came upon a bear inside my tent eating my food! What colour was the bear?

How high do you have to count before you use the letter “a” in the English spelling of the whole number?

There is a box full of marbles,
all but two are blue,
all but two are green,
and all but two are red.

How many marbles are in the box?

How can you throw a ball as hard as you can and have it come back to you even if it doesn't hit anything there is nothing attached to it and no one else catches or throws it.

All of Jacob's shoes are red except two.
All of Jacob's shoes are green except two.
All of Jacob's shoes are yellow except two.

How many shoes does Jacob have?

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

John enters a small room. The Door Closes.
When the door opens, John is in a larger room.

Explain?