317  Leg-Stamp
닭다리 개다리 1

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There are 80 heads of Chickens and Dogs together. Altogether there are 220 legs. How many chickens are there?



There are 120 heads of Chickens and Dogs together. Altogether there are 340 legs. How many chickens are there?



There are 230 heads of Chickens and Dogs together. Altogether there are 640 legs. How many chickens are there?



There are 100 heads of Chickens and Dogs together. Altogether there are 260 legs. How many chickens are there?



There are 70 heads of Chickens and Dogs together. Altogether there are 200 legs. How many chickens are there?

There are 180 stamps which are 5-cent stamps and 6-cent stamps. Altogether they cost 960 cents. How many 5-cent stamps are there?



There are 260 stamps which are 6-cent stamps and 4-cent stamps. Altogether they cost 1340 cents. How many 6-cent stamps are there?



There are 210 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 920 cents. How many 4-cent stamps are there?



There are 270 stamps which are 3-cent stamps and 9-cent stamps. Altogether they cost 1530 cents. How many 3-cent stamps are there?



There are 230 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1600 cents. How many 8-cent stamps are there?

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