Answer: 12 ostriches. If there were 38 four-legged animals, there would be 152 legs, but then 24 legs are missing - that's 12 pairs, so 12 animals with only two legs.
Answer: 12 ostriches. If there were 38 four-legged animals, there would be 152 legs, but then 24 legs are missing - that's 12 pairs, so 12 animals with only two legs.