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England schools
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England university
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Scotland schools
Taxonomy: mathcentre
Taxonomy: Kind of activity
Taxonomy: Context
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| Alexander Corner | said | Needs to be tested | 3 months, 2 weeks ago |
History
Alexander Corner 3 months, 2 weeks ago
Published this.Alexander Corner 3 months, 2 weeks ago
Gave some feedback: Needs to be tested
Alexander Corner 3 months, 2 weeks ago
Gave some feedback: Ready to use
Alexander Corner 3 months, 2 weeks ago
Gave some feedback: Needs to be tested
Alexander Corner 5 months ago
Created this as a copy of ISBN-10.| Name | Status | Author | Last Modified | |
|---|---|---|---|---|
| ISBN-10 | Needs to be tested | Alexander Corner | 03/01/2025 13:00 | |
| ISBN-13 | Needs to be tested | Alexander Corner | 03/01/2025 13:00 |
| Name | Type | Generated Value |
|---|
| x1 | integer |
9
|
||||
| x2 | integer |
7
|
||||
| x3 | integer |
8
|
||||
| x4 | integer |
4
|
||||
| x5 | integer |
2
|
||||
| x6 | integer |
8
|
||||
| x7 | integer |
3
|
||||
| x8 | integer |
8
|
||||
| x9 | integer |
7
|
||||
| x10 | integer |
1
|
||||
| x11 | integer |
8
|
||||
| x12 | integer |
2
|
||||
| check_digit | number |
3
|
||||
| parity | matrix |
Matrix of size 1×12
|
||||
| digits | matrix |
Matrix of size 12×1
|
||||
| check | number |
7
|
||||
| ISBN | string |
978428387182?
|
Generated value: integer
- ISBN
- digits
This variable doesn't seem to be used anywhere.
Information only
Ask the student a question, and give any hints about how they should answer this part.
ISBN-13 is an error-correcting code which superceded ISBN-10 to assign a unique identifier to every published book. Its checksum calculation also matches that of barcodes.
Each ISBN-13 code is a thirteen-digit number, using the digits 0 to 9. All calculations are performed modulo 10. E..g, 9781476766690.
The last digit is a check digit, which is calculated based on the previous nine digits. Let xi represent the digit in position i of the ISBN, e.g., in 9780131862395 we have x1=9, x2=7, x3=8, …, x13=5 etc. Then, for an ISBN x1x2x3x4x5x6x7x8x9x10x11x12x13, the following checksum must be satisfied:
x1+3x2+x3+3x4+x5+3x6+x7+3x8+x9+3x10+x11+3x12+x13≡0mod10.
E.g., for 9780131862395 we get
9+(3×7)+8+(3×0)+1+(3×3)+1+(3×8)+6+(3×2)+3+(3×9)+5=120=12×10≡0mod10.
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| Part | Test | Passed? |
|---|---|---|
| Information only | ||
| Number entry | ||
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