Randbetween

[aaronbeckman]

I need help with the formula for assigning 20 randomized numbers (1-20) that can not repeat. Please help. Thank you!

 

[shg]

In A1:A20, list the numbers 1 to 20

In another column (say B1:B20), enter =rand()

Sort both columns by column B.

 

[Eric W]

Excel 2010

	A
1	List
2	1
3	4
4	6
5	12
6	10
7	20
8	14
9	9
10	17
11	15
12	16
13	3
14	7
15	19
16	2
17	5
18	11
19	13
20	8
21	18

<colgroup><col style="width: 25pxpx"><col></colgroup><thead>
</thead><tbody>
</tbody>

Sheet12​

Array Formulas Cell Formula A2 {=LARGE(ROW($1:$20)*NOT(COUNTIF($A$1:A1, ROW($1:$20))), RANDBETWEEN(1,21-ROW(A1)))} <thead> </thead><tbody> </tbody> Entered with Ctrl+Shift+Enter. If entered correctly, Excel will surround with curly braces {}. Note: Do not try and enter the {} manually yourself

<tbody>
</tbody>

Then copy the formula in A2 and paste it through A21. You can generate a new list just by recalculating the sheet (F9).