The strange math problem makes me scratch my head.
scratch one's head
idiomTo puzzle, ponder, or wonder about something.
Origin
disputed originscratch + one's + head
I scratched my head for a while trying to understand why the computer stopped working so suddenly.
The detective scratched his head as he reviewed the conflicting evidence, unable to reconcile the witness statements with the physical facts of the case.
- 01
abound in one's own sense
To follow one’s own inclinations and opinions.
- 02
ace up one's sleeve
A surprise advantage of which others are not aware.
- 03
act one's age
To behave in a manner appropriate to one's age.
- 04
act one's age, not one's shoe size
Synonym of act one's age (“to behave in a mature manner; to avoid being childish”).
- 05
afraid of one's own shadow
Exceptionally timid.
- 06
air one's dirty laundry in public
To reveal one's sordid secrets to the public.
- 07
air one's dirty linen in public
Synonym of air one's dirty laundry in public.
- 08
albatross around one's neck
A characteristic, possession, associate, or previous deed that hinders one's ability to succeed.