730  Leg-Stamp
닭다리 개다리 1

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



There are 130 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 580 legs. How many chickens are there?



There are 150 heads of Chickens and Dogs together. Altogether there are 400 legs. How many chickens are there?



There are 190 heads of Chickens and Dogs together. Altogether there are 520 legs. How many chickens are there?

There are 180 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 990 cents. How many 7-cent stamps are there?



There are 160 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 1370 cents. How many 8-cent stamps are there?



There are 140 stamps which are 5-cent stamps and 6-cent stamps. Altogether they cost 750 cents. How many 5-cent stamps are there?



There are 250 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1650 cents. How many 5-cent stamps are there?



There are 180 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1170 cents. How many 8-cent stamps are there?

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