597  Leg-Stamp
닭다리 개다리 1

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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 140 heads of Chickens and Dogs together. Altogether there are 360 legs. How many chickens are there?



There are 190 heads of Chickens and Dogs together. Altogether there are 600 legs. How many chickens are there?



There are 210 heads of Chickens and Dogs together. Altogether there are 680 legs. How many chickens are there?

There are 180 stamps which are 3-cent stamps and 5-cent stamps. Altogether they cost 700 cents. How many 3-cent stamps are there?



There are 240 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 1550 cents. How many 7-cent stamps are there?



There are 240 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1570 cents. How many 6-cent stamps are there?



There are 200 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 1260 cents. How many 5-cent stamps are there?



There are 150 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 720 cents. How many 4-cent stamps are there?

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