Discrete Math learning suggestions

[nedsels]

I haven't taken discrete math, and I'm having trouble with Q2 and 3 in the pre-test. Does anyone have suggestions for where I can learn this background?

[dilevin]

These questions are really data structures questions.

you can learn about binary trees here: https://www.geeksforgeeks.org/introduction-to-binary-tree/ which should be helpful.