There are 6 animals in an enclosure. Some are chickens and the others are dogs. Andy counts a total of 20 legs.
- How many dog are there?
- How many chickens are there?
(a)
If all of the animals are chickens,
number of legs needed for chickens
= 6 x 2
= 12
Extra legs needed for each dog
= 4 - 2
= 2
Total extra legs needed for all the dog
= 20 - 12
= 8
Number of dog
= 8 ÷ 2
= 4
(b)
Number of chickens
= 6 - 4
= 2
Answer(s): (a) 4; (b) 2