UselessFacts
Useless facts everyone should know
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The queen in chess was originally just an advisor and was later promoted to queen. Chess originated in the region of India/Persia and spread throughout the world thanks to Arab conquests and traders from around the 11th century onward. When the game reached Queen Isabella (known for establishing the Inquisition), she noticed the piece positioned next to the king, which was then called the "advisor," and she transformed it into the "queen," declaring it the most powerful piece in the game. With this simple decision, she forever changed the rules and history of chess. As a general rule, in languages where chess spread before this change, the piece next to the king is still called the "advisor" (for example, in Arabic, it’s called "Wazir"), while in languages where chess became established after the change, the piece next to the king is called the "queen."
https://www.uschesstrust.org/the-emergence-of-two-powerful-queens-queen-isabella-of-spain-and-the-chess-queen/ 0 reply
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Any number composed solely of the digit 1 (e.g., 1, 11, 111) that falls between 1 and 111,111,111 squared will yield a palindromic number (a number that reads the same forwards and backwards). For example: 111,111,111 x 111,111,111 = 12345678987654321.
Another property is that any palindromic number with an even number of digits (e.g., 4 digits 5665 ) is divisible by 11, and the result of the division will also be a palindromic number. For example: if we divide the number 2234554322 by 11, we get the result 203141302.
https://en.wikipedia.org/wiki/Palindrome 0 reply
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