Bell stretched out his arm and punched the fox five times. The fox fell to the ground with a plop, and the bear hit him in the tree with his last punch. It took the fox a long time to catch his breath.
At this time, a little squirrel with a paper in his left hand and a pen in his right hand was walking on the branch and said, "Oh, this math problem is hard to die. How to do it! " "
The little squirrel suddenly looked up and was startled: "Oh, why is there a dead fox in the tree?"
The lame fox half-opened his eyes and said weakly, "You just died!" " "
"Is it alive?" The little squirrel was startled again.
The lame fox whispered, "Do you have a problem? Can I help? "
The little squirrel said, "You were hurt so badly that you helped me solve the problem. What a good fox! " The topic is this:
There are three ancient trees, and their ages are composed of three different numbers: 1, 2, 3, 4, 5, 6, 7, 8 and 9. One tree is exactly half the age of the other two trees. How old are these three ancient trees? "
The lame fox said, "This question is very simple. However, if I help you make it, can you give me a hand? "
"No problem! Save people! " The little squirrel readily promised.
The fox said, "You use the smallest three of these nine numbers, 1, 2, 3, to form 123, and the largest three numbers to form 789, 123+789 = 9 12, which is exactly twice as much as 456. In other words, 456 is exactly half of the sum of 123 and 789. "
The squirrel said happily, "The ages of these three ancient trees are123,456,789 respectively. How old are you! We must protect these ancient trees. "
The lame fox said, "I have worked out this problem for you." Please pull me up! " "
Little squirrels squeaked a few times, and some little squirrels came out of nowhere. Everyone shouted their songs and dragged the lame fox up. The little squirrel who helped disappeared in the blink of an eye.
The lame fox said to the squirrel, "I want to eat something, but I don't eat vegetarian food."
The little squirrel asked, "What do you want to eat?"
The lame fox said, "Chickens and mice have 49 100 legs to move forward. Please think about it. How many chickens and mice will come? " Dare not eat chicken, so we have to eat mice. "
The little squirrel asked, "How many mice do you want to eat?"
"Do the math!" Fox listed a formula: the number of rats is (100 -49×2)÷2= 1 (only).
The little squirrel asked in surprise, "Is this 1 mouse me?"
"It's your little squirrel!" The lame fox jumped forward with his mouth open.