202  Leg-Stamp
닭다리 개다리 1

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There are 90 heads of Chickens and Dogs together. Altogether there are 280 legs. How many chickens are there?



There are 170 heads of Chickens and Dogs together. Altogether there are 460 legs. How many chickens are there?



There are 170 heads of Chickens and Dogs together. Altogether there are 540 legs. How many chickens are there?



There are 250 heads of Chickens and Dogs together. Altogether there are 760 legs. How many chickens are there?



There are 120 heads of Chickens and Dogs together. Altogether there are 320 legs. How many chickens are there?

There are 180 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 1020 cents. How many 7-cent stamps are there?



There are 260 stamps which are 4-cent stamps and 8-cent stamps. Altogether they cost 1480 cents. How many 4-cent stamps are there?



There are 200 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 880 cents. How many 3-cent stamps are there?



There are 270 stamps which are 6-cent stamps and 4-cent stamps. Altogether they cost 1360 cents. How many 6-cent stamps are there?



There are 180 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1280 cents. How many 8-cent stamps are there?

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