321  Leg-Stamp
닭다리 개다리 1

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There are 180 heads of Chickens and Dogs together. Altogether there are 620 legs. How many chickens are there?



There are 120 heads of Chickens and Dogs together. Altogether there are 340 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 170 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 710 cents. How many 3-cent stamps are there?



There are 170 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 880 cents. How many 4-cent stamps are there?



There are 200 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 740 cents. How many 4-cent stamps are there?



There are 270 stamps which are 6-cent stamps and 8-cent stamps. Altogether they cost 1860 cents. How many 6-cent stamps are there?



There are 130 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 830 cents. How many 5-cent stamps are there?

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