410  Leg-Stamp
닭다리 개다리 1

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There are 130 heads of Chickens and Dogs together. Altogether there are 400 legs. How many chickens are there?



There are 170 heads of Chickens and Dogs together. Altogether there are 420 legs. How many chickens are there?



There are 170 heads of Chickens and Dogs together. Altogether there are 500 legs. How many chickens are there?



There are 260 heads of Chickens and Dogs together. Altogether there are 760 legs. How many chickens are there?



There are 130 heads of Chickens and Dogs together. Altogether there are 320 legs. How many chickens are there?

There are 140 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 800 cents. How many 7-cent stamps are there?



There are 210 stamps which are 4-cent stamps and 9-cent stamps. Altogether they cost 1290 cents. How many 4-cent stamps are there?



There are 160 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 1040 cents. How many 8-cent stamps are there?



There are 210 stamps which are 3-cent stamps and 5-cent stamps. Altogether they cost 810 cents. How many 3-cent stamps are there?



There are 230 stamps which are 3-cent stamps and 6-cent stamps. Altogether they cost 1080 cents. How many 3-cent stamps are there?

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