The results of the math contest were announced today. I got 98 points in the competition, usually ranked second or third. After I got the news, I thought happily, "Haha, this is my first place! By the way, tell mom the news and make her happy! "

So, with joy, I walked home at a brisk pace and told my mother the good news. My mother praised me a few words at first, and suddenly changed her tone and said to me, "Don't be too happy. As far as I know, there are people who do better than you! " After listening to my mother's words, I can't help but feel a little lost: after all, the first position is gone. But I can't help asking, "Huh? who is it? How many points did he get? " Mother smiled and said, "I don't know who it is." I only know his age, grades and ranking multiplied by 2574. Think slowly! " "

I don't think so. It's just a topic, but I can't beat this math high flyers! I wanted to think, went back to my room and thought:

Decomposition factor of 2574: 2574 = 3× 3×1/kloc-0 /×13× 2. This 2 is definitely a ranking, so it is the second place. If you are 9 years old, then the score is 143, which is wrong. It can only be age 13 with a score of 99! Ha! After calculation, the answer is ranking 2, age 13, and the score is 99!

After I worked out the answer, I hurried to tell my mother. My mother hugged me happily and said, "My day is great!" " "Now, I'm in a fog. It took me a long time to realize that my mother was lying to me, and I really got the first place in the exam. Just now, my mother tried to test my math ability and gave me a difficult problem.

In recognition of me, my mother decided to make a celebration dinner. I haven't had a toothache for a long time. After listening to my mother's words, I seemed to see the delicious roast duck and the delicious braised pork. I was so happy that I kissed my mother on the face and cheered again and again: "Thanks for math, long live my mother!" " "

Article 2:

Compare the scores by division.

It is sunny today. I was reading Mathematical Olympiad in Primary School at home, and suddenly I found such a problem: compare11111,1 165538. Suddenly, I became interested and took a pen and "brushed" it on the toilet paper. Soon, I found a solution Is to turn these two false scores into fractions and then use the law of fractions. The smaller the denominator, the greater the score. Solve111111