664  Leg-Stamp
닭다리 개다리 1

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There are 150 heads of Chickens and Dogs together. Altogether there are 420 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 200 heads of Chickens and Dogs together. Altogether there are 660 legs. How many chickens are there?



There are 170 heads of Chickens and Dogs together. Altogether there are 440 legs. How many chickens are there?



There are 140 heads of Chickens and Dogs together. Altogether there are 400 legs. How many chickens are there?

There are 250 stamps which are 3-cent stamps and 6-cent stamps. Altogether they cost 1050 cents. How many 3-cent stamps are there?



There are 150 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 850 cents. How many 5-cent stamps are there?



There are 170 stamps which are 6-cent stamps and 8-cent stamps. Altogether they cost 1200 cents. How many 6-cent stamps are there?



There are 200 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 1500 cents. How many 6-cent stamps are there?



There are 270 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1830 cents. How many 5-cent stamps are there?

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