Download Check Digits and Coding Systems: A Comprehensive Guide and more Quizzes Mathematics in PDF only on Docsity! TERM 1 How do you find the check digit for postal service money orders? DEFINITION 1 add all digits together and divide the sum by 9. The remainder is the check digit TERM 2 How do you find the check digit for Airline tickets, UPS and rental car services? DEFINITION 2 add all digits together and divide sum by 7. Remainder is the check digit TERM 3 How do you find the check digit of a UPC bar code? DEFINITION 3 multiply odd placed digits by 3 and even placed digits by 1. next add all the numbers together. The check digit is the number added so the sum is divisible by 10. TERM 4 What are the weights used to find a check digit for bank routing numbers? DEFINITION 4 weights are 7, 3, 9. Check digit is last digit of sum. TERM 5 How do you find out if a credit card number is valid using code-a-bar? DEFINITION 5 1) weights- 2 in odd positions 1 in even positions 2) sum weighted digits then counts and adds the number of digits in odd positions that exceed 4 3) the result must end in a zero TERM 6 How do you find out if an ISBN number is valid? DEFINITION 6 weights are 10, 9, 8, ... 1 add sum of weighted digits and divide by 11. If the number can be divided by 11 then it is valid -if check digit is 10 write an "x" instead TERM 7 How do you find the check digit for a post net code? DEFINITION 7 add all digits together. The check digit should make it divisible by 10 TERM 8 In a UPC bar code what do the bars on the left represent? The right? DEFINITION 8 left-manufacturer right-product info TERM 9 When there is an even number of 1's on the left part of a UPC bar code which way is it read? odd number? DEFINITION 9 even- right to left odd- left to right TERM 10 What is the process for the soundex coding system for last names? DEFINITION 10 1. get rid of H's and W's 2. assaign #'s to remaining letters 3. if adjacent letters have same numeric value, keep only the first 3 4. delete first letter of original last name if still present 5. delete vowels 6. if remaining # is less than 3 digits, add zero's until it is 3 digits 7. Put first letter of last name before the first digit
