To put two and two together is to work out the truth from the clues you have. She put two and two together.
To put two and two together and make five is the standard joke about getting it wrong. People put two and two together far faster than anybody hiding something expects.
1phraseput two and two togetherTo work out the truth from the clues you have.
“Anybody could put two and two together after the second cancellation.”
put two and two together is a phrase.
Practised in Idioms