What mathematical knowledge is hidden in the Winter Olympics?

1. Winter Olympics cities and temperatures: positive and negative numbers

This Winter Olympics is hosted by Beijing and hosted by Zhangjiakou. Why choose Zhangjiakou instead of Northeast China, where the temperature is cooler? In addition to distance, it also has a lot to do with temperature.

Previous Winter Olympics were usually held in February, with temperatures ranging from -17°C to 10°C being the ideal temperature.

2. Winter Olympics Competition Year: Arithmetic Sequence

The Winter Olympics are held every four years. This year is the 24th Winter Olympics. Find the 21st What year are the Winter Olympics? 3. Winter Olympics competition events: classification and collection

This Beijing Winter Olympics has a total of 7 major events, 15 sub-events, and 109 minor events.

4. Flags of different countries: shape and proportion

The flags at the venue are basically rectangular and look similar, but in fact, their length-to-width ratios are not exactly the same. consistent. For example, the ratio of the Chinese flag is 2:3, the American flag is 10:19, and the Swedish flag is 5:8.

Moreover, even if the national flags are vertical stripes, the proportions of different colors may be different. For example, the width ratio of blue, white, and red in the French flag is 30:33:37. and 2000m, 3000m and 5000m relay races.

5. Gu Ailing won the championship: rotation angle

After lagging behind her opponent in the first two jumps, Gu Ailing performed an off-axis rotation of 1620 degrees for two weeks. The number of rotations intuitively reflects the difficulty of the ski jump. From 1080, 1440 to 1620 degrees, the difficulty is super doubled, miraculously winning the championship.