Are there any resources for challenging questions in c programming?

Question

Ive done plenty of factorials, prime numbers, even and odds, printing patterns types of questions but what i wanted was to practice some challenging questions that are based on real life scenarios.
Does anyone know of books or other resources where i can find such challenging questions.
Thanks!!

Answer 1

Visit here:
https://www.w3resource.com/c-programming-exercises/

Answer 2

Search here
https://code.sololearn.com/WaVusr8J1KvK/?ref=app
on challenges sections