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

O T T F F S S ?

After a heavy Thanksgiving meal, the night watchman went to work. In the morning, he told his boss he had dreamed that a saboteur planted a bomb in the factory and that he felt it was a warning. The boss promptly fired him. Worker confused, Why boss fire him?

Find the missing value of "?" in the letter sequence below.

CAD
EBG
KBM
OCR
DDH
NL?

I look at you, you look at me I raise my right, you raise your left. What am I?

You are in a room that has three switches and a closed door. The switches control three light bulbs on the other side of the door. Once you open the door, you may never touch the switches again. How can you definitively tell which switch is connected to each of the light bulbs?

I have eight fingers and two thumbs but I do not live. What Am I?

If I put in one canary per cage, I have one bird too many. If I put in two canaries per cage, I have one cage too many. How many cages and canaries do I have?

Complete the table series riddle by finding the number that can replace "??".

What number do you get when you multiply all of the numbers on a telephone's number pad?

Why are all black people so quick ?