This is the 4880th most frequent Portuguese word.
fáceis
"Fáceis" means "easy" in English (plural form).
Here, 'fáceis' describes the attribute 'easy' of 'exercícios', the plural of 'exercise', agreeing in number (plural).
Os exercícios de matemática deste nível são fáceis.
The math exercises at this level are easy.
In this context, 'fáceis' is used to describe 'situações', meaning situations, which are plural and feminize.
As situações parecem fáceis até que olhamos mais de perto.
The situations seem easy until we look closer.
Here, 'fáceis' modifies 'soluções', emphasizing their simplicity or ease of comprehension, agreeing in gender and number.