841  Leg-Stamp
닭다리 개다리 1

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There are 180 heads of Chickens and Dogs together. Altogether there are 480 legs. How many chickens are there?



There are 150 heads of Chickens and Dogs together. Altogether there are 440 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 heads of Chickens and Dogs together. Altogether there are 560 legs. How many chickens are there?



There are 160 heads of Chickens and Dogs together. Altogether there are 420 legs. How many chickens are there?

There are 160 stamps which are 3-cent stamps and 6-cent stamps. Altogether they cost 720 cents. How many 3-cent stamps are there?



There are 240 stamps which are 5-cent stamps and 4-cent stamps. Altogether they cost 1080 cents. How many 5-cent stamps are there?



There are 170 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 990 cents. How many 5-cent stamps are there?



There are 130 stamps which are 3-cent stamps and 9-cent stamps. Altogether they cost 690 cents. How many 3-cent stamps are there?



There are 180 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 960 cents. How many 7-cent stamps are there?

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