322  Leg-Stamp
닭다리 개다리 1

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



There are 170 heads of Chickens and Dogs together. Altogether there are 580 legs. How many chickens are there?



There are 210 heads of Chickens and Dogs together. Altogether there are 640 legs. How many chickens are there?



There are 200 heads of Chickens and Dogs together. Altogether there are 640 legs. How many chickens are there?



There are 180 heads of Chickens and Dogs together. Altogether there are 620 legs. How many chickens are there?

There are 260 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 1430 cents. How many 8-cent stamps are there?



There are 280 stamps which are 6-cent stamps and 8-cent stamps. Altogether they cost 1940 cents. How many 6-cent stamps are there?



There are 230 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 1220 cents. How many 4-cent stamps are there?



There are 280 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 2220 cents. How many 7-cent stamps are there?



There are 250 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 1800 cents. How many 6-cent stamps are there?

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