Question: How do I create a random list of unique numbers from say 1 to 10, without using VBA (Generate unique random numbers) (Unique random numbers in VBA)
or without enabling iterative calculation in excel options
or not using "helper" columns?

Answer:

random-list-of-unique-numbers

Formula in cell A2:

=INDEX(SMALL(IF(COUNTIF($A$1:A1, ROW($1:$10))=0, ROW($1:$10), ""), ROW(INDIRECT("1:"&SUM(IF(COUNTIF($A$1:A1, ROW($1:$10))=0, 1, 0))))), ROUND(RAND()*SUM(IF(COUNTIF($A$1:A1, ROW($1:$10))=0, 1, 0)), 0), ) + CTRL + SHIFT + ENTER copied down to cell A14.

How to customize array formula to your excel work sheet
If your list starts at F3 change $A$1:A1 to $F$2:F2 in the above array formula. To change the numbers from 1 to 10 to, for example, 2 to 12, change $1:$10 to $2:$12 also in the above array formula.

Press F9 to generate a new random list of unique numbers.

Download excel sample file for this tutorial.
unique-random-list-of-numbers.xls
(Excel 97-2003 Workbook *.xlsx)

Functions in this article:

INDEX(array,row_num,[column_num])
Returns a value or reference of the cell at the intersection of a particular row and column, in a given range

MATCH(lookup_value;lookup_array; [match_type]
Returns the relative position of an item in an array that matches a specified value

IF(logical_test;[value_if:true];[value_if_false])
Checks whether a condition is met, and returns one value if TRUE, and another value if FALSE

COUNTIF(range,criteria)
Counts the number of cells within a range that meet the given condition

SUM(number1,[number2],)
Adds all the numbers in a range of cells

SMALL(array,k) returns the k-th smallest row number in this data set.

ROW(reference) returns the rownumber of a reference

INDIRECT(ref_text,[a1])
Returns the reference specified by a text string

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