YMMV. I studied zero hours for the SAT and did well. There are honestly no hard questions, just a lot of them in a short time. I have studied at least a hundre

YMMV. I studied zero hours for the SAT and did well. There are honestly no hard questions, just a lot of them in a short time. I have studied at least a hundred hours for leetcode and I still have never passed an interview at a well paying company. Leetcode hards are legit hard.