Digits are from 1 to 9 the sum of the 9 greatest digits is = 9+9+9+9+9+9+9+9+9 = 81 the sum of the 9 lowest digits is = 1+1+1+1+1+1+1+1+1+1= 9 and so : 81 + 9 = 90
Well it's 10 digits, you forgot 0. It arose first in India between 400 bce and 400 ce, and then was passed to west Asia. They are mistaken as Arabic numerals since the Arab mathematicians were the...
A check digit is the twelfth and final number in a USPS bulk mail barcode string and is used by the USPS to detect barcode errors. The first eleven digits depict three groupings: the delivery zone...
In order to make the number as big as possible, you would want the greatest value digits in the greatest place value. Thus the first number would have to be 9. Once 9 has been used, the second number...