[Q]: Which of the following solutions is better for the following goal:
Prevent paint on window panes.

[A]: Rub window pane with bar soap.

[Q]: Which of the following solutions is better for the following goal:
How to cut open the top of a helium bottle?

[A]: Find a helium bottle online then empty the bottle completely. Cut open the tip and open the tube also from the side. The dimensions of the hole depend on your lateral opening on your stove.

[Q]: Which of the following solutions is better for the following goal:
To change the dimensions of a piece of metal, you can

[A]: Use an angle grinder

[Q]: Which of the following solutions is better for the following goal:
Make a colored pencil case.

[A]:
Place in DVD case.