638  Leg-Stamp
닭다리 개다리 1

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There are 220 heads of Chickens and Dogs together. Altogether there are 700 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 220 heads of Chickens and Dogs together. Altogether there are 640 legs. How many chickens are there?



There are 170 heads of Chickens and Dogs together. Altogether there are 520 legs. How many chickens are there?



There are 170 heads of Chickens and Dogs together. Altogether there are 500 legs. How many chickens are there?

There are 250 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 1900 cents. How many 8-cent stamps are there?



There are 180 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1200 cents. How many 8-cent stamps are there?



There are 150 stamps which are 3-cent stamps and 5-cent stamps. Altogether they cost 570 cents. How many 3-cent stamps are there?



There are 190 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 1090 cents. How many 4-cent stamps are there?



There are 170 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 1110 cents. How many 8-cent stamps are there?

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