> These puzzles were not a leetcode like gates (in fact they very explicitly were NOT required for applicants), but rather a way of advertising to programmers that ITA was not just another boring big corp that would suck your passion for coding away.

However, from the linked page:

> To be considered for an interview, you may need to solve one of the programming puzzles below.

In fairness, they used the word "may". But I wouldn't call that "explicitly NOT required".