How can you place a pencil on the floor so that no one can jump over it?
Riddle AnswerHard Riddles
Identical Twins
Suppose there are twin brothers, one which always tells the truth and one which always lies. (So in this case they both know what is true and false, or as you put it, both are accurate in their knowledge.) What one yes-no question could you ask to either one of the brothers to figure out which one he is?
Riddle Answer27 Balls
Given 27 table tennis balls, one is heavier than the others.
What is the minimum number of weighings (using a two-pan balance scale) needed to guarantee identifying the heavy one? The other 26 balls weigh the same.
Riddle AnswerMagic Grass
At a garden shop they’re selling Magic Grass, a patch of sod that doubles in size every day. A man goes to buy some and figures that his garden is big enough that if he buys one patch, it will cover his garden in 14 days, because each day it doubles in size. So he decides to speed up the process, and buys two patches of sods.
How many days will it now take for the Magic Grass to cover his garden?
Riddle AnswerTwo Hours Ago
If two hours ago it was as long after one o’clock in the afternoon as it was before one o’clock in the morning, what time is it right now?
Riddle Answer