Lista de exercícios do ensino médio para impressão
(CESCEM - 1977) The set $\,\mathbb{X}\,$ is a subset of the$\,\mathbb{N}\,$ (natural numbers) and has the following elements:
12 multiples of 4
7 multiples of 6
5 multiples of 12
8 odd numbers
The number of elements of $\,\mathbb{X}\,$ are:
a)
32
b)
27
c)
24
d)
22
e)
20