729  Leg-Stamp
닭다리 개다리 1

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There are 210 heads of Chickens and Dogs together. Altogether there are 640 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 230 heads of Chickens and Dogs together. Altogether there are 640 legs. How many chickens are there?



There are 160 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 520 legs. How many chickens are there?

There are 190 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 1110 cents. How many 5-cent stamps are there?



There are 280 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 1660 cents. How many 5-cent stamps are there?



There are 210 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1380 cents. How many 6-cent stamps are there?



There are 210 stamps which are 3-cent stamps and 4-cent stamps. Altogether they cost 710 cents. How many 3-cent stamps are there?



There are 260 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 1530 cents. How many 8-cent stamps are there?

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