Question

There are 30 birds in a enclosure at the zoo 1/5 of the birds are native to north America 1/3 of the birds are native to south America the remaining birds are native to Australia how many birds of the birds in the enclosure are native to Australia?

Answer 1

30/5 = 6 (Native to N.America)
30/3 = 10 (Native to S.America)
10+6 = 16.
30-16 = 14

The rest is = 14.

So, 14 are native to Australia