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

O T T F F S S ?

John was driving a bus and got stuck when passing through an underpass. Then came Jacob with a needle and got the bus out of the underpass.

What did the boy do?

Find the missing number in the sequence.

3 5/3 7/5 11/7 ? 17/11

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

Find the next number in the series.
1 10 24 43 67 ?

Three friends decide to distribute the soda cans they had among them. When all of them had drunk four cans each, the total number of cans that remained was equal to the cans each one of them had after they had divided the cans.

Can you calculate the total number of cans before distribution?

You need to arrange three 7 and mathematical symbols to form number 1?

What is so fragile that saying its name breaks it?

Twice ten are six of us,

Six are but three of us,

Nine are but four of us;

What can we possibly be?

Would you know more of us?

Twelve are but six of us,

Five are but four, do you see?

What are we?

Find the next number in the series below.

6 18 270 72090 ?