put two and two together

US /pʊt tuː ænd tuː təˈɡɛðər/
UK /pʊt tuː ænd tuː təˈɡɛðər/
"put two and two together" picture
1.

atar cabos, deducir la verdad

to deduce the truth from obvious clues or information

:
When I saw them together, I immediately put two and two together and realized they were dating.
Cuando los vi juntos, inmediatamente até cabos y me di cuenta de que estaban saliendo.
She didn't tell me directly, but I could put two and two together from her hints.
No me lo dijo directamente, pero pude atar cabos por sus indirectas.