If the set of factors of a whole number n, including n itself but not 1 is denoted by F(n), and F(16)∩F(40) = F(x) then x is
8
From the given definition that \(F(n)\) is the set of factors of a whole number n, including n itself but not 1.
We can compute
F(16)={2,4,8,16}
and
F(40)={2,4,5,8,10,20,40}
Also
F(16)∩F(40)=F(x) [∵ given]
⇒{2,4,8}=F(x)
⇒F(8)=F(x)
⟹x=8