Using Scroll Bar
Recap on Selction - IF and Randomise
(e.g. the factors of the number 12 are 6,4,3 and 2 because they divide into 12 exactly).
Hint
to find out whether a number X is a factor of Y use :
IF Y mod X =0 (there is nothing remaining when Y is divided by X)
Extension
Tell the user if the number they entered is a prime number