400  Leg-Stamp
닭다리 개다리 1

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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 170 heads of Chickens and Dogs together. Altogether there are 600 legs. How many chickens are there?



There are 100 heads of Chickens and Dogs together. Altogether there are 320 legs. How many chickens are there?



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

There are 220 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1560 cents. How many 8-cent stamps are there?



There are 130 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 620 cents. How many 4-cent stamps are there?



There are 250 stamps which are 6-cent stamps and 3-cent stamps. Altogether they cost 1110 cents. How many 6-cent stamps are there?



There are 130 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 1100 cents. How many 8-cent stamps are there?



There are 210 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 1550 cents. How many 8-cent stamps are there?

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