A1 · 14 min
The number that agrees
Um, dois, três count. Primeiro, segundo, terceiro put things in a line — a floor, a queue, a first coffee in Lisbon. They take the gender of the thing: o primeiro café, a primeira vez. Segunda-feira is Monday, not 'the second'. Keep that split or the week collapses.
É no primeiro andar.
It's on the first floor.