527  Leg-Stamp
닭다리 개다리 1

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There are 210 heads of Chickens and Dogs together. Altogether there are 680 legs. How many chickens are there?



There are 120 heads of Chickens and Dogs together. Altogether there are 400 legs. How many chickens are there?



There are 180 heads of Chickens and Dogs together. Altogether there are 440 legs. How many chickens are there?



There are 190 heads of Chickens and Dogs together. Altogether there are 640 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 stamps which are 7-cent stamps and 8-cent stamps. Altogether they cost 1180 cents. How many 7-cent stamps are there?



There are 240 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1560 cents. How many 5-cent stamps are there?



There are 210 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 1370 cents. How many 7-cent stamps are there?



There are 180 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 1060 cents. How many 7-cent stamps are there?



There are 210 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 930 cents. How many 5-cent stamps are there?

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