150  Leg-Stamp
닭다리 개다리 1

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There are 250 heads of Chickens and Dogs together. Altogether there are 720 legs. How many chickens are there?



There are 210 heads of Chickens and Dogs together. Altogether there are 580 legs. How many chickens are there?



There are 190 heads of Chickens and Dogs together. Altogether there are 580 legs. How many chickens are there?



There are 120 heads of Chickens and Dogs together. Altogether there are 300 legs. How many chickens are there?



There are 230 heads of Chickens and Dogs together. Altogether there are 660 legs. How many chickens are there?

There are 200 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 1160 cents. How many 7-cent stamps are there?



There are 210 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1330 cents. How many 5-cent stamps are there?



There are 170 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 1120 cents. How many 7-cent stamps are there?



There are 240 stamps which are 3-cent stamps and 9-cent stamps. Altogether they cost 1500 cents. How many 3-cent stamps are there?



There are 120 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 530 cents. How many 4-cent stamps are there?

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