Hey there!

So for your first question, I want you to think about it like this:

Notice how the bolts are much, much bigger than the nuts and screws? Of course, so start off by organizing the nuts and screws!

So in this case, it would be super easy just to separate the bigger nuts with the bigger nuts and the smaller screws with the smaller screws! As if one side of a table was placed with

nuts and the other with screws. (Oh and make sure to use your own words upon writing.)

From there, you can pick out the bolts so your life is much easier.

For the second one, it's actually just the newer version of Desmos, as the number line system is kinda broken and it's just graphs right now. But that's okay, because I've managed to find this graph you can use on the internet:

https://imgur.com/X54nvqMFor the last one, it's pretty straight forward man. Just divide and multiply, find out the values, and put them in order. (Useful tip, nuts and screws are always the smallest size!)