212  Leg-Stamp
닭다리 개다리 1

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



There are 110 heads of Chickens and Dogs together. Altogether there are 320 legs. How many chickens are there?



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 640 legs. How many chickens are there?



There are 180 heads of Chickens and Dogs together. Altogether there are 440 legs. How many chickens are there?

There are 170 stamps which are 4-cent stamps and 8-cent stamps. Altogether they cost 960 cents. How many 4-cent stamps are there?



There are 260 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 1710 cents. How many 7-cent stamps are there?



There are 190 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1210 cents. How many 6-cent stamps are there?



There are 260 stamps which are 3-cent stamps and 9-cent stamps. Altogether they cost 1560 cents. How many 3-cent stamps are there?



There are 220 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 1830 cents. How many 8-cent stamps are there?

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