Question

In a group of dogs and their owners, there are exactly 20 heads and 64 legs. How many dogs are in the group

Answer 1

If we assume that everyone in the group is an owner, we would have

`20*2=40` legs.

`64-40=24` legs

Therefore, we need 24 more legs.

These 24 additional legs can be made from the difference of legs between the owners and dogs.

In this case, dogs have
`4-2=2` more legs than an owner.

24 ÷ 2 = 12.

There are 12 dogs in the group.