103  Leg-Stamp
닭다리 개다리 1

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There are 200 heads of Chickens and Dogs together. Altogether there are 520 legs. How many chickens are there?



There are 110 heads of Chickens and Dogs together. Altogether there are 360 legs. How many chickens are there?



There are 180 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 340 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 170 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1330 cents. How many 7-cent stamps are there?



There are 230 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1680 cents. How many 8-cent stamps are there?



There are 230 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 840 cents. How many 4-cent stamps are there?



There are 180 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 610 cents. How many 4-cent stamps are there?



There are 120 stamps which are 5-cent stamps and 4-cent stamps. Altogether they cost 550 cents. How many 5-cent stamps are there?

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