Curiosities
Triangular Numbers
If a triangular number is multiplied by 1 plus 8, and the result is a square number. See: 1.8 + 1 = 9 1 = 25 + 3.8 This statement was made by Plutarch about the year 100 AD...
Another way of calculating powers
Pythagoras discovered that there is another way to calculate power: as the sum of odd numbers. He found that n² is equal to the sum of the first n odd natural numbers. example: 52 = 1 +3 +5 +7 +9 = 25...
Number Palindrome
A number is palindrome when read from left to right or right to left is always the same value, eg 77, 434, 6446 82 328. To obtain a palindrome from another, reverses the order of the numbers and the sum with the given number, a number of times until it finds a number palindrome, for example: From th...
The largest prime number of Fermat
The record for the largest known Generalized Fermat prime: +1 16717632768, which has 171,153 digits was discovered by Yves Gallot (this is the eighth largest known prime today, and largest known prime that is not Mersenne....
The Origin of Zero
Although the great practice of the invention is attributed to the Hindu zero, partial or limited development of the concept of zero are evident in several other numbering systems at least as old as the Hindu system, if not more. But the real effect of any of these steps earlier on the full developme...
