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 ?

What do you think with the below Picture ?

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

A man and a dog were going down the street. The man rode, yet walked. What was the dog’s name?

A clock loses 10 minutes each hour. If the clock is set correctly at noon, what time is it when it reads 3 PM?

Our product and our sum always give the same answer. Who are we?

A high school has a strange principal. On the first day, he has his students perform an odd opening day ceremony:

There are one thousand lockers and one thousand students in the school. The principal asks the first student to go to every locker and open it. Then he has the second student go to every second locker and close it. The third goes to every third locker and, if it is closed, he opens it, and if it is open, he closes it. The fourth student does this to every fourth locker, and so on. After the process is completed with the thousandth student, how many lockers are open?

Create a number using only the digits 4,4,3,3,2,2,1 and 1. So i can only be eight digits. You have to make sure the ones are separated by one digit, the twos are separated by two digits the threes are separated with three digits and the fours are separated by four digits