410,397 views
42 votes
42 votes
If an island's only residents are penguins and bears, and if there are 24 heads and 64 feet on the island, how many penguins and how many bears are

on the island

User Digiliooo
by
2.9k points

1 Answer

21 votes
21 votes

Penguins (P): 1 H + 2 Ft

Bears (B): 1 H + 4Ft

Heads Equation: 1P + 1B = 14 → -2(1P + 1B = 14) → -2P - 2B = -28

Feet Equation: 2P + 4B = 30 → 1(2P + 4B = 30) → 2P + 4B = 30

2B = 2

B = 1

Heads Equation: 1P + 1B = 14 → 1P + 1(1) = 14 → P = 13

Answer: 13 Penguins and 1 Bear

User Train
by
3.4k points