354  Leg-Stamp
닭다리 개다리 1

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There are 90 heads of Chickens and Dogs together. Altogether there are 240 legs. How many chickens are there?



There are 170 heads of Chickens and Dogs together. Altogether there are 420 legs. How many chickens are there?



There are 160 heads of Chickens and Dogs together. Altogether there are 460 legs. How many chickens are there?



There are 190 heads of Chickens and Dogs together. Altogether there are 600 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 130 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 1100 cents. How many 8-cent stamps are there?



There are 210 stamps which are 3-cent stamps and 9-cent stamps. Altogether they cost 1410 cents. How many 3-cent stamps are there?



There are 220 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 1650 cents. How many 8-cent stamps are there?



There are 120 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 580 cents. How many 4-cent stamps are there?



There are 270 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1770 cents. How many 8-cent stamps are there?

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