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?
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Gold Chain Puzzle
A woman wants to buy something at an auction where you bid grams of gold instead of money. She owns a length of gold chain (with 2 ends) made of 23 interlocking loops, each weighing 1 gram.
She wants to go to a jeweler before the auction to cut the minimum number of loops that would allow her to pay any sum from 1 to 23. For example, she could pay a 13 gram price with a 12 link chain and a single link. After much thought, she figures out a way to do it by cutting just 2 of the loops in the chain.
How many loops are in the pieces of chains that she has after the 2 cuts?
Riddle AnswerCalendar Cubes
A man has two paper cubes on his desk. Every day he arranges both cubes so that the front faces show the current day of the month. What numbers are required on the faces of the cubes to allow this for all possible days in the calendar?
Riddle AnswerClock Time
What is the first time after 3PM when the hour and minute hands of a clock are exactly on top of each other?
Riddle AnswerThe Gong
Suppose a clock takes 7 seconds to strike 7. How long does it take for the same clock to strike 10?
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