504  Leg-Stamp
닭다리 개다리 1

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There are 180 heads of Chickens and Dogs together. Altogether there are 560 legs. How many chickens are there?



There are 230 heads of Chickens and Dogs together. Altogether there are 640 legs. How many chickens are there?



There are 220 heads of Chickens and Dogs together. Altogether there are 680 legs. How many chickens are there?



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



There are 160 heads of Chickens and Dogs together. Altogether there are 520 legs. How many chickens are there?

There are 170 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 1270 cents. How many 8-cent stamps are there?



There are 260 stamps which are 5-cent stamps and 4-cent stamps. Altogether they cost 1170 cents. How many 5-cent stamps are there?



There are 200 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1400 cents. How many 8-cent stamps are there?



There are 170 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1310 cents. How many 7-cent stamps are there?



There are 210 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 1280 cents. How many 8-cent stamps are there?

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