Math puzzle: iron chain problem
Chain problem
We need chains for production. There are only five chains in the warehouse, each with only three iron rings. The length of these five chains is just what we need.
Excuse me: How can these five three iron rings be connected when only three iron rings are cut off?
Answer: Cut three iron rings of 1 chain to get three broken iron rings, and then connect the other four chains with these three broken iron rings.
Math puzzle: calculating the unit price of lettering
Calculate lettering unit price
There is a lettering gentleman, and his price list reads: lettering? Official script? 4 corners; Carved? Imitation song style? Six quarters? Your seal? 8 jiao; Carved? Your lover's seal? 12 yuan. Then what is the unit price of his lettering?
A: 2 cents per word. Official script? There are two words, four divided by two equals two angles. Imitation song style? There are three words, six divided by three equals two angles. Your seal? There are four words, eight divided by four equals two angles. Your lover's seal? There are six words, 12 divided by 6 equals 2 angles, so each word has 2 angles.
Math puzzle: cross the bridge before the lights go out
Cross the bridge before the lights go out.
Five members of the Wang family cross the bridge at night. It takes 1 minute for Xiao Wang to cross the bridge, 3 minutes for Xiao Wang's younger brother, 6 minutes for Xiao Wang's father, 8 minutes for Xiao Wang's mother and 12 minutes for Xiao Wang's grandfather. Only two people can cross the bridge at a time. Because it is night, you must bring a light when crossing the bridge. Xiao Wang has a lamp that will go out after 30 minutes. How can we arrange to ensure that Wang's family will cross the bridge before the lights go out?
Answer: 1. Xiao Wang and his younger brother went over and his younger brother came back, which took 6 minutes. 2. It took 13 minutes for Mom and Grandpa to come back from Xiao Wang. 3. Dad Xiao Wang went over and Xiao Wang came back, which took 7 minutes; It takes three minutes for Xiao Wang and his brother to cross the bridge. 6+ 13+7+3=29 minutes
Math puzzle: How to distribute steamed bread money in 4 yuan?
How to divide the steamed bread for 4 yuan?
A, B, C and D agreed to go for an outing in the countryside. When they had lunch at noon, they opened the lunch box and found that everyone was holding steamed buns. A brought seven, B five, C four and D none. So everyone decided to put all the steamed buns together and distribute them equally, and D was willing to take out 4 yuan money instead of steamed buns.
Excuse me, how should people with steamed bread distribute this 4 yuan money?
Answer: A got 3 yuan, B got/kloc-0 yuan, and C got nothing. Because there are 16 steamed buns, each person can get four on average. In this way, because C originally brought four steamed buns, it will not increase or decrease; A and B gave D three steamed buns and/kloc-0 steamed buns respectively, so they shared the 4 yuan money given by D in proportion.
Math puzzles: debt shortcuts
Debt shortcut
A borrowed 10 from B, 20 from C, 30 from D, and 40 from A. By chance, four people came together. At this time, the four decided to pay off the money. They want to settle accounts with the least amount of mobile funds. How should they calculate this account?