713  Leg-Stamp
닭다리 개다리 1

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There are 150 heads of Chickens and Dogs together. Altogether there are 400 legs. How many chickens are there?



There are 130 heads of Chickens and Dogs together. Altogether there are 400 legs. How many chickens are there?



There are 230 heads of Chickens and Dogs together. Altogether there are 660 legs. How many chickens are there?



There are 100 heads of Chickens and Dogs together. Altogether there are 260 legs. How many chickens are there?



There are 130 heads of Chickens and Dogs together. Altogether there are 340 legs. How many chickens are there?

There are 190 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 1440 cents. How many 8-cent stamps are there?



There are 260 stamps which are 6-cent stamps and 4-cent stamps. Altogether they cost 1340 cents. How many 6-cent stamps are there?



There are 170 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 960 cents. How many 8-cent stamps are there?



There are 270 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 1640 cents. How many 8-cent stamps are there?



There are 140 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 840 cents. How many 7-cent stamps are there?

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