206  Leg-Stamp
닭다리 개다리 1

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There are 170 heads of Chickens and Dogs together. Altogether there are 600 legs. How many chickens are there?



There are 90 heads of Chickens and Dogs together. Altogether there are 260 legs. How many chickens are there?



There are 200 heads of Chickens and Dogs together. Altogether there are 540 legs. How many chickens are there?



There are 180 heads of Chickens and Dogs together. Altogether there are 600 legs. How many chickens are there?



There are 170 heads of Chickens and Dogs together. Altogether there are 400 legs. How many chickens are there?

There are 160 stamps which are 3-cent stamps and 4-cent stamps. Altogether they cost 540 cents. How many 3-cent stamps are there?



There are 250 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1650 cents. How many 5-cent stamps are there?



There are 180 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 660 cents. How many 4-cent stamps are there?



There are 250 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1760 cents. How many 8-cent stamps are there?



There are 210 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 1350 cents. How many 7-cent stamps are there?

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