674  Leg-Stamp
닭다리 개다리 1

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There are 220 heads of Chickens and Dogs together. Altogether there are 680 legs. How many chickens are there?



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



There are 170 heads of Chickens and Dogs together. Altogether there are 580 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 250 heads of Chickens and Dogs together. Altogether there are 720 legs. How many chickens are there?

There are 220 stamps which are 3-cent stamps and 4-cent stamps. Altogether they cost 750 cents. How many 3-cent stamps are there?



There are 240 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 1320 cents. How many 7-cent stamps are there?



There are 210 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 1100 cents. How many 4-cent stamps are there?



There are 170 stamps which are 3-cent stamps and 5-cent stamps. Altogether they cost 650 cents. How many 3-cent stamps are there?



There are 220 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 1400 cents. How many 7-cent stamps are there?

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