Question

While in college, why did Euler work through advanced math books on his own

Answer 1

His teacher didnt have time so advised him to tutor privately

Answer 2

Answer:

Professor Johann Bernoulli was a very busy person, and refused to give Euler private lessons.

Step-by-step explanation:

Johann Bernoulli would not teach Leonhard Euler privately, mainly on superficial math problems.

But Euler received from Johann Bernoulli a valuable advice to read more advanced math books on his own and work on more elaborated problems, and only  if he could not be able to solve a equation he was allowed to visit Johan on Sunday afternoon to help him.