七零八落
Meaning
Scattered, broken up, in disarray — things spread out or left in a mess.
In a sentence
After the move, the books were 七零八落 across three rooms.
Usage note
Physical scattering is the core sense; can extend to plans falling apart.
Where you see it in Brain Challenge
This idiom appears in the picture-idiom levels as a picture or number clue. When the clue shows numbers, the digits usually become the first characters of each half of the idiom — that is why so many chengyu start with 一, 三, 五, 七, 九 or 十.