HistorianBook.com project of numbers.

11 information.

11
Change language11 in English words
eleven
XI
odd
Square root
3.3166247903554
Binary number
1011
11 in Fibonacci Sequence
No
This number consist from
2 digits
Sum of 2 digits (1+1)
2
Prime
11 on wikipedia Google 11 #11 on instagram #11 on twitter Reverse 11 Shuffle 11
her's something really interesting about 11. Something that you see in your daily life. Grab a book. Behind the book, you'll see a bar code. Just above the barcode, you'll see ISBN along with 13 or 10 numbers printed on it. Now, we're gonna take the 10 digit <a href="/s.php?s=barcode">#barcode</a>. Multiply the last digit(leftmost) by 10, the next digit by 9 then the next by 8 and so on until you multiply the rightmost number by 1. Now add the ten numbers you got. Here, 0x10+1x9+9x8+…+8x1 You'll get a multiple of 11. Here I got 231 which equals 21x11. For all barcodes with 10 digits, the sum of the products of the digits and their corresponding positon values will be a multiple of 11. This is used so that won't be any errors in entering the bar code to a computer or another device.
Visitor #1
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