488  Leg-Stamp
닭다리 개다리 1

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There are 100 heads of Chickens and Dogs together. Altogether there are 260 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 200 heads of Chickens and Dogs together. Altogether there are 640 legs. How many chickens are there?



There are 210 heads of Chickens and Dogs together. Altogether there are 640 legs. How many chickens are there?



There are 110 heads of Chickens and Dogs together. Altogether there are 360 legs. How many chickens are there?

There are 160 stamps which are 3-cent stamps and 5-cent stamps. Altogether they cost 660 cents. How many 3-cent stamps are there?



There are 180 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1170 cents. How many 6-cent stamps are there?



There are 160 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 870 cents. How many 6-cent stamps are there?



There are 140 stamps which are 3-cent stamps and 6-cent stamps. Altogether they cost 570 cents. How many 3-cent stamps are there?



There are 230 stamps which are 3-cent stamps and 6-cent stamps. Altogether they cost 1050 cents. How many 3-cent stamps are there?

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