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

O T T F F S S ?

What has to be broken before you can use it?

Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?

In two decks of cards, what is the least amount of cards you must take to be *guaranteed* at least one four-of-a-kind?

A professor thinks of two consecutive numbers between 1 and 10.
'A' knows the 1st number and 'B' knows the second number

A: I do not know your number.
B: Nor do I know your number.
A: Now I know.

What are the four solutions for this?

Find the smallest sentence with all the English alphabet.

A frog is at the bottom of a 30-meter well. Each day he summons enough energy for one 3-meter leap up the well. Exhausted, he then hangs there for the rest of the day. At night, while he is asleep, he slips 2 meters backwards. How many days does it take him to escape from the well?

A finger goes in me. You fiddle with me when you're bored. The best man always has me first. What am I?

It is a six-letter word.
The first four letters are me.
The second and last letters are the same.
The fourth second and last letter is payment.

Who is it?

There was a strange boy who was born before his father. How can this be possible?