The Zoo had some lions and some parrots. The supervisor counted 15 heads and 50 legs. How many lions are there?
- 5
- 10
- 30
- 40
Explanation
A zoo has some lions and Parrots.
A zoo has x lions and y parrots
The supervisor counted 15 heads and 50 legs. How many lions are there?
Heads
x + y = 15
y = 15 – x
x = 4 legs and y has 2 legs
4x + 2y = 50
4x + 2(15-x) = 50
4x + 30 – 2x = 50
2x = 20
X = 20/2
X = 10
So x means lions, so there 10 Lions
CHECKING our answer***
40 + 10 = 50 legs
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