Number：The Ultimate Level-Up in Intelligence Games

Author: Huang Junbo
Publisher:
Publish Date: 2005-11-01
Features:
The Weighing Problem: There are twelve balls that look identical, and it is known that one of them is defective, with a weight that is slightly different but measurable compared to the other eleven. Now, with a sensitive scale that has no weights, how can you identify the defective ball in just three weighings and determine whether it is heavier or lighter than the standard balls?
The Frog's Survival Story: A frog falls into a well that is 18 feet deep. During the day, it climbs up 6 feet, but at night, it slides back 3 feet. At this rate, how many days will it take for the frog to climb out of the well?
The Two Turtles Race: Two turtles are racing against each other. When Turtle A reaches the 10-meter finish line, Turtle B has only reached 9 meters. Now, if Turtle A's starting line is moved back 1 meter, and the two turtles start the race simultaneously, will they reach the finish line at the same time?
A Math-Savvy Police Officer: "Good morning, Officer!" said Mr. Mel, "Can you tell me what time it is?" "Of course," replied Officer Clancy. He was known in the police force for his mathematical prowess. "One-quarter of the time from midnight to now, plus half the time from now to midnight, will tell you the correct time." Can you figure out the exact time when this puzzling conversation took place?
Playing brain teasers is not just for fun; it is also a way to develop your creative thinking skills. As you overcome one challenge after another, your logical reasoning, imagination, and attention to detail will be greatly enhanced. During the process of playing these games, you can fully utilize the various abilities of your creative intelligence, examine problems from multiple perspectives, and incorporate all the clues into your thinking. This brainstorming and idea-sparking mode will keep your mind working at high speed, enabling you to make more insightful observations and more accurate judgments in your studies and work.