479  Leg-Stamp
닭다리 개다리 1

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There are 120 heads of Chickens and Dogs together. Altogether there are 340 legs. How many chickens are there?



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 660 legs. How many chickens are there?



There are 100 heads of Chickens and Dogs together. Altogether there are 280 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 190 stamps which are 4-cent stamps and 9-cent stamps. Altogether they cost 1310 cents. How many 4-cent stamps are there?



There are 260 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1820 cents. How many 5-cent stamps are there?



There are 210 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 1140 cents. How many 6-cent stamps are there?



There are 220 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1390 cents. How many 6-cent stamps are there?



There are 260 stamps which are 6-cent stamps and 8-cent stamps. Altogether they cost 1800 cents. How many 6-cent stamps are there?

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