891  Leg-Stamp
닭다리 개다리 1

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There are 120 heads of Chickens and Dogs together. Altogether there are 300 legs. How many chickens are there?



There are 150 heads of Chickens and Dogs together. Altogether there are 500 legs. How many chickens are there?



There are 200 heads of Chickens and Dogs together. Altogether there are 660 legs. How many chickens are there?



There are 230 heads of Chickens and Dogs together. Altogether there are 640 legs. How many chickens are there?



There are 240 heads of Chickens and Dogs together. Altogether there are 680 legs. How many chickens are there?

There are 150 stamps which are 6-cent stamps and 4-cent stamps. Altogether they cost 800 cents. How many 6-cent stamps are there?



There are 170 stamps which are 4-cent stamps and 9-cent stamps. Altogether they cost 1030 cents. How many 4-cent stamps are there?



There are 160 stamps which are 3-cent stamps and 9-cent stamps. Altogether they cost 780 cents. How many 3-cent stamps are there?



There are 170 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 1260 cents. How many 8-cent stamps are there?



There are 210 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 1380 cents. How many 5-cent stamps are there?

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