Question

In an Aviary there are a certain number of birds. Four birds wear ankle bands and five wear wing
tags. Of the three yellow birds in the Aviary, each bird only has either an ankle band or wing tag.
Both red birds in the Aviary have wing tags.
What is the minimum possible number of birds in the Aviary?
A: 5 B: 6 C: 7 D: 8 E: 9 or more

Answer 1

Answer:

D: 8 BIRDS

Explanation:

The three yellow birds have either ankle bands or tags so, to simply it, let’s assume two have ankle bands and one a tag.

Both red birds have a tag, but, they may also both have an ankle bands. So that makes two of each. Added to the original three items, that totals 4 ankle bands and three tags.

The remainder is two tags which can only be worn by a minimum of two others birds. Let’s call them blue birds.

Therefore we have:

-- Two blue birds

-- Three yellow birds

-- Two red birds

So a total of eight birds altogether is the minimum.