40050

Smallest factor multiple cards are: 2 4 8 16

These are the smallest numbers because the task won’t allow you to use 1 which would have been the smallest number to start off with. Also 2 is the next smallest number you can use after 1. First start off with 2 and find the next multiple of 2 which is 4. The next multiple of 4 is 8 and the next multiple of 8 is 16.Those numbers create the smallest factor multiple chains. If you use 3 as your first number it won’t work because the next multiple will be 6 then 12 and 24.You can’t use this example because everything is larger than the correct answer. Therefore this is the right answer because it is the smallest possible bunch of numbers you can use to create a factor multiple chain.