I'm sorry but what is this even supposed to mean (Attempt tests)?

l0 = List.iterate(inc,0), l1 = [0,1,2,3,4,5,6,7,8,9], l2 = l0.take(10)
l1 === l2
l1 === l2
expected [ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 ] to deeply equal [ 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 ]

Where does [ 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 ] come from? I do console.log(List.iterate(inc, 0).take(10).toList()); and it prints [
0, 1, 2, 3, 4,
5, 6, 7, 8, 9
]

Same question to the following:

l = List.iterate(inc,0)

l.head()
l.tail().head()
l.tail().take(3)
expected [ 2, 3, 4 ] to deeply equal [ 1, 2, 3 ].

The following info:

The interesting thing about polydivisiblity is that it relates to the underlying number, but not the base it is written in, so if aliens came to Earth and used base 23 (11 fingers on one hand and 12 on the other), no matter what squiggles they use to write numbers, they would find the same numbers polydivisible!

As well as this:

...(and a polydivisible base 10 number when converted to 11100 in base 10).

seems to be misleading. For example, number 3 (base 10) is polydivisble in base 10, but the same "underlying number" in base 2 (11) is not polydivisble.
And 11100 is not polydivisble in base 10...