930  Leg-Stamp
닭다리 개다리 1

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There are 170 heads of Chickens and Dogs together. Altogether there are 420 legs. How many chickens are there?



There are 210 heads of Chickens and Dogs together. Altogether there are 560 legs. How many chickens are there?



There are 110 heads of Chickens and Dogs together. Altogether there are 340 legs. How many chickens are there?



There are 160 heads of Chickens and Dogs together. Altogether there are 400 legs. How many chickens are there?



There are 170 heads of Chickens and Dogs together. Altogether there are 480 legs. How many chickens are there?

There are 140 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 910 cents. How many 8-cent stamps are there?



There are 250 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1630 cents. How many 6-cent stamps are there?



There are 210 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 1080 cents. How many 4-cent stamps are there?



There are 170 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1180 cents. How many 8-cent stamps are there?



There are 190 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 970 cents. How many 3-cent stamps are there?

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