Posted by **Austin** on Monday, December 7, 2009 at 11:10pm.

A group of goats and ducks have a total of 99 heads and legs among them. There are twice as many ducks as there are goats. How many are there of each?

- 5th grade (math) -
**drwls**, Tuesday, December 8, 2009 at 2:52am
5G + 3D = 99

2G = D

5G + 6G = 11 G = 99

G = 9 (the number of goats)

D = 18 (the number of ducks)

I used algebra. Without using algebra, you'd have to try different numbers for G, double the number for D, and see what works.

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