# What a neat mathematical problem is worth? (4,3)

I believe the answer is:

tidy sum

'worth?' is the definition.

The answer and definition can be both quantities as well as being singular nouns.

Maybe there's an association between them I don't understand?

'what a neat mathematical problem' is the wordplay.

'what a neat' becomes 'tidy' (synonyms).

'mathematical problem' becomes 'sum' (I've seen this before).

'tidy'+'sum'='TIDY SUM'

'is' is the link.

Can you help me to learn more?

(Other definitions for *tidy sum* that I've seen before
include
"A lot of money"
,
"Considerable amount"
.)