There are a few ways to generate unique numbers for worksheets in Excel. One way is to use the RAND function. This function will return a random number between 0 and 1. To get a whole number, you can multiply the result by 100, 1000, or whatever number you like. For example, =RAND()*100 will return a random number between 0 and 100.

Another way to generate unique numbers is to use the RANK function. This function will return the rank of a number in a list of numbers. For example, if you have a list of numbers in cells A1:A5, and you want to find the rank of the number in cell A3, you would use the following formula: =RANK(A3,A1:A5).

You can also use the INDEX function to generate unique numbers. This function returns a value from a given array or range. For example, if you have a list of numbers in cells A1:A5, and you want to find the value in cell A3, you would use the following formula: =INDEX(A1:A5,3).

Finally, you can use the COUNTIF function to generate unique numbers. This function counts the number of cells that meet a given criteria. For example, if you have a list of numbers in cells A1:A5, and you want to count how many times the number 3 appears in that range, you would use the following formula: =COUNTIF(A1:A5,"3").