615  Leg-Stamp
닭다리 개다리 1

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There are 210 heads of Chickens and Dogs together. Altogether there are 660 legs. How many chickens are there?



There are 230 heads of Chickens and Dogs together. Altogether there are 720 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 240 heads of Chickens and Dogs together. Altogether there are 700 legs. How many chickens are there?



There are 170 heads of Chickens and Dogs together. Altogether there are 440 legs. How many chickens are there?

There are 200 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 740 cents. How many 5-cent stamps are there?



There are 210 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 1230 cents. How many 4-cent stamps are there?



There are 200 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 1350 cents. How many 8-cent stamps are there?



There are 230 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 1770 cents. How many 6-cent stamps are there?



There are 170 stamps which are 3-cent stamps and 9-cent stamps. Altogether they cost 930 cents. How many 3-cent stamps are there?

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