831  Leg-Stamp
닭다리 개다리 1

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There are 220 heads of Chickens and Dogs together. Altogether there are 640 legs. How many chickens are there?



There are 190 heads of Chickens and Dogs together. Altogether there are 600 legs. How many chickens are there?



There are 210 heads of Chickens and Dogs together. Altogether there are 600 legs. How many chickens are there?



There are 240 heads of Chickens and Dogs together. Altogether there are 740 legs. How many chickens are there?



There are 200 heads of Chickens and Dogs together. Altogether there are 580 legs. How many chickens are there?

There are 170 stamps which are 3-cent stamps and 5-cent stamps. Altogether they cost 690 cents. How many 3-cent stamps are there?



There are 140 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 920 cents. How many 7-cent stamps are there?



There are 140 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 980 cents. How many 5-cent stamps are there?



There are 180 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1300 cents. How many 5-cent stamps are there?



There are 240 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 1170 cents. How many 3-cent stamps are there?

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