The annual Spring Festival is coming again. Every household hangs red lanterns and sticks festive Spring Festival couplets. Spring Festival couplets are indispensable mascots for China people during the Spring Festival. In the new year, I found red couplets symbolizing happiness everywhere.
All Spring Festival couplets express people's longing for a better life. I also found a lot of math knowledge in Spring Festival couplets!
Many Spring Festival couplets use numbers. For example, "Three Yang Kai Tai gives birth to spring scenery, and the four seasons are auspicious to broadcast the gospel", "A hundred rivers rise safely and happily when they meet the sea, and thousands of miles sing prosperous songs with the same wind", "Thousands of spring wines welcome the festival, and hundreds of millions of people sing new songs to celebrate the New Year", "A hundred million years of Nanshan life, and thousands of East China Sea songs flow". These Spring Festival couplets skillfully use numbers to make them more vivid.
Speaking of mathematics in Spring Festival couplets, there is an interesting story!
Since the reign of Emperor Qianlong for 50 years, the imperial court has invited more than 1000 famous old people from all over the country to hold grand birthday banquets for them.
At the banquet, Gan Long saw an old birthday girl with golden hair and a young appearance. He was very happy when asked that she was actually the oldest participant. On the topic of the birthday girl's age, say the first couplet: "Flowers bloom again, adding 37 years." Ji Xiaolan, a well-read minister in the audience, immediately made a couplet: "Celebrate the ancient and the rare, celebrate the Spring and Autumn".
What's the age of the birthday girl?
In ancient times, "Hua Jia" meant sixty years old, and "Gu Xi" meant seventy years old. So the above formula is 2× 60+3× 7 = 14 1 and the following formula is 2× 70+1=141. This old birthday girl is actually 14 1 year old.
I didn't expect such interesting math knowledge in Spring Festival couplets!