# Randomization Based Off a Set of Rules

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#### Kawan

##### New Member
Hi everyone,

I have a rather tricky problem to solve.

For each row in my table (for each person) - refer to screenshot named "My Table", I would like excel to randomly generate a 9 digit number (in Column N) but based on a certain set of rules.

Here is how I currently generate them 1 by 1 manually:

View attachment 51533

1. Yellow cells: I only modify the numbers of this row.
• The first 3 digits of this row are based off the person's year of birth (refer to screenshot called "First 3 digits"). A 3 digit code is assigned based on the year of birth.
• Then I manually change the last 6 digits of this row one by one so that the green cell equals to an even number ending in 0, so: 10 or 20 or 30 or 40 or 50 or 60, etc.
2. Orange cells:
• This row is the factor row and never changes, each of the number above it is multiplied by this factor. So in the example above, 3 (in yellow) will be multiplied 1 (in red), 9 (in yellow) by 2 (in red), 4 (in yellow) by 1 (in red), and so fourth.
3. Red cells: The formula for each red cell is the same with the exception of the reference cells in the formula, so for example for cell F5 the formula is:
Excel Formula:
``=IF(SUM(F3*F4)>=10,SUM(F3*F4)-9,SUM(F3*F4))``

for cell G5 the formula is:
Excel Formula:
``=IF(SUM(G3*G4)>=10,SUM(G3*G4)-9,SUM(G3*G4))``

4. Green Cell: This cell is just the SUM of of the red cells, so
Excel Formula:
``=SUM(F5:N5)``
. It must always equal to an even number ending in 0, so: 10 or 20 or 30 or 40 or 50 or 60, etc...

To sum it up:

For each row in my table, so for each person (refer to screenshot called "My table" in the results worksheet), I would like excel to generate a random 9 digit number in the column called "9 Digit Number" (Column N) based on the set of rules explained above.

I have thousands of rows so you can understand why I would like this process to be automated.

Please do not hesitate to ask me should you require more clarification/information.

Thank you,
Kawan.

#### Attachments

• 9 Digits Worksheet.png
253.4 KB · Views: 4
• First 3 Digits.png
169.9 KB · Views: 4
• My Table - Results Worksheet.png
101.3 KB · Views: 4

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#### Kawan

##### New Member
Hi everyone,

I have a rather tricky problem to solve.

For each row in my table (for each person) - refer to screenshot named "My Table", I would like excel to randomly generate a 9 digit number (in Column N) but based on a certain set of rules.

Here is how I currently generate them 1 by 1 manually:

View attachment 51533

1. Yellow cells: I only modify the numbers of this row.
• The first 3 digits of this row are based off the person's year of birth (refer to screenshot called "First 3 digits"). A 3 digit code is assigned based on the year of birth.
• Then I manually change the last 6 digits of this row one by one so that the green cell equals to an even number ending in 0, so: 10 or 20 or 30 or 40 or 50 or 60, etc.
2. Orange cells:
• This row is the factor row and never changes, each of the number above it is multiplied by this factor. So in the example above, 3 (in yellow) will be multiplied 1 (in red), 9 (in yellow) by 2 (in red), 4 (in yellow) by 1 (in red), and so fourth.
3. Red cells: The formula for each red cell is the same with the exception of the reference cells in the formula, so for example for cell F5 the formula is:
Excel Formula:
``=IF(SUM(F3*F4)>=10,SUM(F3*F4)-9,SUM(F3*F4))``

for cell G5 the formula is:
Excel Formula:
``=IF(SUM(G3*G4)>=10,SUM(G3*G4)-9,SUM(G3*G4))``

4. Green Cell: This cell is just the SUM of of the red cells, so
Excel Formula:
``=SUM(F5:N5)``
. It must always equal to an even number ending in 0, so: 10 or 20 or 30 or 40 or 50 or 60, etc...

To sum it up:

For each row in my table, so for each person (refer to screenshot called "My table" in the results worksheet), I would like excel to generate a random 9 digit number in the column called "9 Digit Number" (Column N) based on the set of rules explained above.

I have thousands of rows so you can understand why I would like this process to be automated.

Please do not hesitate to ask me should you require more clarification/information.

Thank you,
Kawan.
Also, I noticed I made a mistake here:
It should be:
2. Orange cells:
• This row is the factor row and never changes, each of the number above it is multiplied by this factor. So in the example above, 3 (in yellow) will be multiplied 1 (in orange), 9 (in yellow) by 2 (in orange), 4 (in yellow) by 1 (in orange), and so fourth.

#### Fluff

##### MrExcel MVP, Moderator
Duplicate to: Randomization Based Off a Set of Rules

In future, please do not post the same question multiple times. Per Forum Rules (#12), posts of a duplicate nature will be locked or deleted.

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