Final answer:
Jutta's implied criticism of the protagonist's interests in mathematics and playing with radios is suggesting a lack of curiosity about the broader world.
Step-by-step explanation:
The implied criticism in Jutta's statement about the protagonist's interests, which are heavily oriented towards mathematics and playing with radios, is a lack of curiosity about the world at large.
By pointing out the protagonist's focus on mathematics and radios, Jutta suggests that the protagonist is not interested in understanding the broader picture of what's happening around them. This implies that the protagonist may be missing out on a deeper level of engagement with the world, failing to question and understand the events and forces shaping their environment.