BBC:

An apparently unsolvable exam question on a Chinese maths paper has left both students and social media stumped.
Primary school students at a school in the Chinese district of Shunqing were faced with this question on a paper: “If a ship had 26 sheep and 10 goats onboard, how old is the ship’s captain?”
The question appeared on a recent fifth-grade level paper, intended for children around 11 years old.
Pictures of the question, along with students’ valiant attempts at answers, surfaced this week on Chinese social media – where it triggered debate and quickly went viral.

Education officials later said the question was not a mistake, but meant to highlight “critical awareness”.