243  Leg-Stamp
닭다리 개다리 1

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There are 120 heads of Chickens and Dogs together. Altogether there are 400 legs. How many chickens are there?



There are 160 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 460 legs. How many chickens are there?



There are 240 heads of Chickens and Dogs together. Altogether there are 680 legs. How many chickens are there?



There are 110 heads of Chickens and Dogs together. Altogether there are 280 legs. How many chickens are there?

There are 160 stamps which are 6-cent stamps and 8-cent stamps. Altogether they cost 1060 cents. How many 6-cent stamps are there?



There are 220 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 790 cents. How many 4-cent stamps are there?



There are 210 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 1470 cents. How many 6-cent stamps are there?



There are 210 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 1780 cents. How many 8-cent stamps are there?



There are 160 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 1200 cents. How many 6-cent stamps are there?

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