761  Leg-Stamp
닭다리 개다리 1

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There are 180 heads of Chickens and Dogs together. Altogether there are 500 legs. How many chickens are there?



There are 200 heads of Chickens and Dogs together. Altogether there are 560 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 120 heads of Chickens and Dogs together. Altogether there are 320 legs. How many chickens are there?



There are 150 heads of Chickens and Dogs together. Altogether there are 400 legs. How many chickens are there?

There are 210 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 1200 cents. How many 7-cent stamps are there?



There are 200 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 1190 cents. How many 4-cent stamps are there?



There are 170 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 950 cents. How many 7-cent stamps are there?



There are 200 stamps which are 7-cent stamps and 8-cent stamps. Altogether they cost 1450 cents. How many 7-cent stamps are there?



There are 200 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 920 cents. How many 3-cent stamps are there?

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