Mathematics is a beautiful science. So or so put it by an English scientist named Godfrey Harold Hadry. Einstein compared mathematics to poetry, and any musician would say that music is imbued with mathematics. And they are all right. There are all sorts of interesting facts about mathematics that tell the story.
Good to know
The word “mathematics” comes from the Greek “mathema,” which means “teaching,” “science,” “study.”
World Mathematics Day is celebrated on March 6.
In Thai, the number 5 is pronounced “ha,” and some Thais, instead of typing “ha-ha-ha,” type slang – 555 on the keyboard.
0 is the only number that cannot be displayed using Roman numerals. So how did the ancient Romans do without it? They used the word “nulla” instead of a number.
There is a special magic in the number 9. Multiply any number by 9, then add all the digits in that number until you get a single-digit number, and the resulting sum will always equal 9.
How do you check if you can divide a number by 3? To do this, add up all the digits of the number. If what you get is divisible by 3, the same is true for the original number.
The equal sign (=) was invented by the English mathematician Robert Record in the 16th century. He got tired of writing the word “equal” in equations every time.
The name of the popular search engine Google came from the word “googol”. This word stands for a number, namely one with a hundred zeros.
Of all the shapes with the same perimeter, the circle has the largest area. Also of all the shapes with the same area, a circle has the smallest perimeter.
What is the Fibonacci sequence? It is an order of numbers where adding the previous two results in the next number. Nature abounds with examples of this sequence. The seeds of many plants are arranged in a spiral from the center to the outer edges. For example, sunflower seeds are arranged this way, and they mimic this sequence.
What is a flip number? It is a number that can be read the same way from the beginning and the end: e.g., 12421.
1089 x 9 = 9801.
In the following equation, the number 100 is derived from an arithmetic operation of standing digits in order:
The unusual number 7
There is an interesting fact of mathematics about the number 7 – the only number in the chain of numbers from 1 to 10 which can neither be multiplied nor divided so that it remains within the chain. For example, you can multiply 5 by 2 and get 10. 8 and 6 are divided by 2.
There are seven deadly sins, seven wonders of the world, as many days of the week, colors of the rainbow, dwarfs, seas, and pillars of wisdom. As you can see, seven is also a number firmly associated with human culture.
On a dice, the sum of the dots on opposite sides is always seven.
0,999999… = 1
It can’t be, but it is. Here is the proof.
If 10xN = 9.9999…,
Then N = 0.9999…
Subtracting N from 10N leaves 9N=9.
Then N=1. But we already know that N is also 0.9999…
It turns out that 1=0.9999…
Cicadas use the strategy of indivisible numbers in their evolution
The period of underground maturation in cicadas is either 13 or 17 years. Both 13 and 17 are indivisible numbers. Presumably, these insects were less likely to come into contact with predators whose life spans were a divisible number of years.
Take any four-digit number, do the following steps, and you end up with 6174.