349  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 110 heads of Chickens and Dogs together. Altogether there are 300 legs. How many chickens are there?



There are 220 heads of Chickens and Dogs together. Altogether there are 600 legs. How many chickens are there?



There are 200 heads of Chickens and Dogs together. Altogether there are 640 legs. How many chickens are there?



There are 70 heads of Chickens and Dogs together. Altogether there are 200 legs. How many chickens are there?

There are 180 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 1020 cents. How many 6-cent stamps are there?



There are 170 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1160 cents. How many 8-cent stamps are there?



There are 200 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 1300 cents. How many 8-cent stamps are there?



There are 270 stamps which are 4-cent stamps and 9-cent stamps. Altogether they cost 1680 cents. How many 4-cent stamps are there?



There are 130 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 920 cents. How many 8-cent stamps are there?

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