608  Leg-Stamp
닭다리 개다리 1

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There are 200 heads of Chickens and Dogs together. Altogether there are 620 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 170 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 440 legs. How many chickens are there?



There are 180 heads of Chickens and Dogs together. Altogether there are 560 legs. How many chickens are there?

There are 270 stamps which are 5-cent stamps and 4-cent stamps. Altogether they cost 1230 cents. How many 5-cent stamps are there?



There are 210 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 910 cents. How many 4-cent stamps are there?



There are 240 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 5-cent stamps. Altogether they cost 810 cents. How many 4-cent stamps are there?



There are 220 stamps which are 4-cent stamps and 9-cent stamps. Altogether they cost 1480 cents. How many 4-cent stamps are there?

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