You are given 8 identical looking balls. One of them is heavier than the rest of the 7 (all the others weigh exactly the same). You are provided with a simple mechanical balance scale. How can you find the heavier ball by using the scale only twice?
Riddle AnswerMath Riddles
Singles Tennis Tournament
A singles tennis tournament is held in which 30 men participate. If a player is eliminated as soon as he loses a match, how many matches are required to determine the winner?
Riddle AnswerA Mile Long Train
A mile long train is moving at 60 miles per hour when it reaches a mile-long tunnel. How long does it take the entire train to pass through the tunnel?
Riddle AnswerPressure Cooker for Profit
A friend of mine bought a used pressure cooker for $60. She somehow did not find it useful and so when a friend of hers offered her $70, she sold it to her. However, she felt bad after selling it and decided to buy it back from her friend by offering her $80. After having bought it once again, she felt that she did not really need the cooker. So she sold it at the auction for $90.
How much profit did she make? Did she at all make any profit?
Riddle AnswerWeight of Cement Block
A cement block balances evenly in the scales with three quarters of a pound and three quarters of a cement block. What is the weight of the whole cement block?
Riddle Answer