418  Leg-Stamp
닭다리 개다리 1

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There are 90 heads of Chickens and Dogs together. Altogether there are 240 legs. How many chickens are there?



There are 120 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 400 legs. How many chickens are there?



There are 210 heads of Chickens and Dogs together. Altogether there are 660 legs. How many chickens are there?



There are 80 heads of Chickens and Dogs together. Altogether there are 220 legs. How many chickens are there?

There are 190 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 1210 cents. How many 7-cent stamps are there?



There are 180 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 820 cents. How many 7-cent stamps are there?



There are 210 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 1380 cents. How many 8-cent stamps are there?



There are 190 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1430 cents. How many 5-cent stamps are there?



There are 140 stamps which are 4-cent stamps and 9-cent stamps. Altogether they cost 860 cents. How many 4-cent stamps are there?

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