When Cuomo was a middle school teacher, one day in class, he forgot the product of seven plus nine when calculating on the blackboard! When he hesitated for a long time, a classmate said the answer was 6 1, so he wrote it down accordingly.
How do I know that another voice said he should write 69. Of course, Cuomo knew there was only one correct answer. As for 6 1, 69 or other figures, he can't decide. So he began to analyze, saying loudly that 6 1 is a prime number, not a product, 65 is a multiple of 5, and 67 is also a prime number. 69 seems too big, so the answer is 63!
The second interesting point.
Honeycomb is a strictly hexagonal cylinder, with a flat hexagonal opening at one end and a closed hexagonal diamond bottom at the other end, which consists of three identical diamonds. The obtuse angle of the collapsed chassis 109 degrees 28 minutes, and all acute angles are 70 degrees 32 minutes, which is both firm and material-saving. The honeycomb wall thickness is 0.073 mm, and the error is very small.
Red-crowned cranes always move in groups, forming a "human" shape. The angle of the herringbone is 1 10 degrees. More accurate calculation also shows that the half angle of herringbone-that is, the angle between each side and the direction of the crane group is 54 degrees 44 minutes 8 seconds! And the angle of diamond crystal is exactly 54 degrees, 44 minutes and 8 seconds! Is it a coincidence or some "tacit understanding" of nature?
Spider's "gossip" web is a complex and beautiful octagonal geometric pattern. Even with a ruler compass, it is difficult for people to draw a pattern as symmetrical as a spider's web. In winter, cats always hug their bodies into a ball when they sleep, and there is also math in it, because the ball minimizes the surface area of the body, so it emits the least heat.
The real "genius" of mathematics is coral. Corals write "calendars" on their bodies. They "draw" 365 stripes on their body walls every year, apparently one a day. Strangely, paleontologists found that corals 350 million years ago "painted" 400 watercolors every year. Astronomers tell us that when the earth has only 2 1.9 hours a day, it is 400 days instead of 365 days a year. (Life Times)
The third interesting point.
Bajie went to Huaguoshan to find Wukong, but the Great Sage was not at home. The little monkeys warmly entertained Bajie and picked 100 of the most delicious peaches in the mountains. Bajie said happily, "Let's eat together!" How to eat? Bajie counted 30 monkeys, found a branch and drew left and right on the ground. Draw a picture and list the formula, 100÷30=3. 1.
Pig Bajie pointed to the top three and said generously, "You can eat three peaches each. Look, the rest 1 I ate it! " The little monkeys were very grateful to Bajie. They thanked him one by one, and then each took his share.
When Wukong came back, the little monkeys told Wukong how generous Bajie was today and why he only ate a pecan. Seeing Pig's arrangement, Wukong shouted, "What a fool! He ate too many pecans and didn't even say a word. I'll find him! "
Haha, do you know how many peaches Bajie ate?