The JLPT N4 Kanji (Onyomi) quiz is a very specialized Japanese quiz testing your knowledge of a subset of JLPT N4 Kanji: Onyomi.
Even though this quiz is only JLPT N4, it's quite challenging.
Questions come from the JLPT N4 Kanji wiki list.
Note, if JPDrills questions are monitored by JPDrills members to ensure their quality. Please "flag" a question if you believe JPDrills needs to look at it.