Nana Maru San Batsu, Iwa Kakeru!: Sport Climbing Girls Recommendations
Both animes aren't the most similar in genres, i guess, since one is centered on rock climbing and one is on quiz bowl, but the two anime have a similar vibe/feel to it.
The main characters are similar in a way - they're both the intelligent type
> Iwa Kakeru! - Konomi used to be a gamer who has great analytical skills
> Nana Maru - Koshiyama (MC) is a bookworm who is good at trivia (he's intelligent (in a sense))