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Shishu Sansaar | Mathematical Games-6
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Game No 26: Cooking Eggs in 9 Minutes You're a cook in a restaurant in a quaint country where clocks are outlawed. You have a four minute hourglass, a seven minute hourglass, and a pot of boiling water. A regular customer orders a nine-minute egg, and you know this person to be extremely picky and will not like it if you overcook or undercook the egg, even by a few seconds. What is the least amount of time it will take to prepare the egg, and how will you do it? See the Answer 26 on Answer Page 6 Game No 27: Many Coins, But No Dollar A man has $1.15 in six coins. He can't make change for a dollar, a half dollar, a quarter, a dime, or a nickel. What coins did he have? See the Answer 27 on Answer Page 6 Game No 28: A Way of Writing 100 Using Only Digit 9 How can you express the number 100 using six nines and no other digits? See the Answer 28 on Answer Page 6 Game No 29: How Many Chocolates? One boy can eat 100 chocolates in half a minute, and another can eat half as many in twice the length of time. How many chocolates can both boys eat in 15 seconds? See the Answer 29 on Answer Page 6 Game No 30: How Much Weight Potatoes Lost Potatoes are made up of 99% water and 1% "potato matter." Jack bought 100 pounds of potatoes and left them outside in the sun for a while. When he returned, he discovered that the potatoes had dehydrated and were now only made up of 98% water. How much did the potatoes now weigh? See the Answer 30 on Answer Page 6.
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Created by Sushma Gupta on January 15, 2002
Contact: sushmajee@yahoo.com
Modified on 06/03/13