520  Leg-Stamp
닭다리 개다리 1

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There are 150 heads of Chickens and Dogs together. Altogether there are 480 legs. How many chickens are there?



There are 240 heads of Chickens and Dogs together. Altogether there are 740 legs. How many chickens are there?



There are 160 heads of Chickens and Dogs together. Altogether there are 440 legs. How many chickens are there?



There are 230 heads of Chickens and Dogs together. Altogether there are 660 legs. How many chickens are there?



There are 90 heads of Chickens and Dogs together. Altogether there are 240 legs. How many chickens are there?

There are 260 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 1430 cents. How many 3-cent stamps are there?



There are 170 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1250 cents. How many 5-cent stamps are there?



There are 180 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 780 cents. How many 5-cent stamps are there?



There are 180 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 1530 cents. How many 8-cent stamps are there?



There are 150 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 1140 cents. How many 6-cent stamps are there?

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