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

O T T F F S S ?

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?

What Deficiency does the below rebus represent?

VIT_MIN

A red house is made out of red bricks. A yellow house is made out of yellow bricks. And, a blue house is made out of blue bricks. So, what is a greenhouse made of?

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

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

The host of a game show offers the guest a choice of three doors. Behind one is an expensive car, but behind the other two are goats.
After you have chosen one door, he reveals one of the other two doors behind which is a goat (he wouldn't reveal a car).

Now he gives you the chance to switch to the other unrevealed door or stay at your initial choice. You will then get what is behind that door.

You cannot hear the goats from behind the doors, or in any way know which door has the prize.

Should you stay, or switch, or doesn't it matter?

What does man love more than life, hate more than death or mortal strife; That which contented men desire; the poor have, the rich require; the miser spends, the spendthrift saves, and all men carry to their graves?

What does this rebus riddle means ?

Transform the word THINK into BRAIN while changing only one letter at a time in a manner that each of the word in the process is a real word!!!