Knot Or Not?

Also known as:

Knot So

This puzzle requires only good visuo-spatial ability. Given images of slack lengths of looped rope, the solver must calculate which would form a knot and which would not. This is a version of the Tangled Lines puzzle which is a common feature of many children's puzzle magazines.

Related puzzles:

Tangled Lines
The illustration of the puzzle Download example puzzle

Instructions:

Calculate which of the lengths of rope etc will form a knot when pulled and which will not.

Appears in:

Puzzler, Puzzler Collection, Puzzler Quiz Kids, Q Junior Puzzles