275  Leg-Stamp
닭다리 개다리 1

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There are 120 heads of Chickens and Dogs together. Altogether there are 380 legs. How many chickens are there?



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



There are 170 heads of Chickens and Dogs together. Altogether there are 580 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 230 heads of Chickens and Dogs together. Altogether there are 720 legs. How many chickens are there?

There are 210 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 1110 cents. How many 3-cent stamps are there?



There are 210 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 910 cents. How many 5-cent stamps are there?



There are 250 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 900 cents. How many 4-cent stamps are there?



There are 210 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 1310 cents. How many 7-cent stamps are there?



There are 240 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 1790 cents. How many 8-cent stamps are there?

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