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

How many times can you subtract the number two from the number fifty?

How far can you walk into the woods?

What numbers should go on the bottom line?
3 6 9 15
8 2 10 12
11 8 19 27
19 10 29 39
? ? ? ?

You order chicken wings at KFC in the boxes of 6, 9 and 20. What is the largest number of wings that you cannot obtain by buying in any combination of the boxes?

What word is pronounced the same if you take away four of its five letters?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

One absent-minded ancient philosopher forgot to wind up his only clock in the house. He had no radio, TV, telephone, internet, or any other means for telling time. So he travelled on foot to his friend's place a few miles down the straight desert road. He stayed at his friend's house for the night and when he came back home, he knew how to set his clock. How did he know?

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?