841  Leg-Stamp
닭다리 개다리 1

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There are 210 heads of Chickens and Dogs together. Altogether there are 600 legs. How many chickens are there?



There are 190 heads of Chickens and Dogs together. Altogether there are 600 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 150 heads of Chickens and Dogs together. Altogether there are 420 legs. How many chickens are there?



There are 130 heads of Chickens and Dogs together. Altogether there are 420 legs. How many chickens are there?

There are 230 stamps which are 7-cent stamps and 8-cent stamps. Altogether they cost 1710 cents. How many 7-cent stamps are there?



There are 140 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 660 cents. How many 3-cent stamps are there?



There are 200 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 1500 cents. How many 6-cent stamps are there?



There are 180 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 890 cents. How many 3-cent stamps are there?



There are 210 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 1110 cents. How many 7-cent stamps are there?

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