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Some money orders have serial numbers that consist of a 10-digit number followed by a check digit. The check digit is chosen to be the sum of the first 10 digits mod 9. Determine the check digit for the given money order serial number. 2552916855−?

Respuesta :

Answer:

3

Step-by-step explanation:

first calculate the sum of the first 10-digits

[tex]2+5+5+2+9+1+6+8+5+5\\sum=48[/tex]

now, in order apply mod 9. we can subtract the above number by the closest multiple of 9.

45 is the multiple of 9 that is closest to our sum, i.e 48

[tex]48 mod 9 = 48 - 9(5)[/tex]

[tex] 48 mod 9 = 3[/tex]

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