421  Leg-Stamp
닭다리 개다리 2

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There are 200 heads of Chickens and Dogs together. Altogether there are 580 legs. How many chickens are there?



There are 170 heads of Chickens and Dogs together. Altogether there are 600 legs. How many chickens are there?



우리 안에 총 140 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 380 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 120 heads of Chickens and Dogs together. Altogether there are 380 legs. How many chickens are there?



There are 200 heads of Chickens and Dogs together. Altogether there are 580 legs. How many chickens are there?

There are 170 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 990 cents. How many 7-cent stamps are there?



There are 140 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 770 cents. How many 3-cent stamps are there?



오늘 7원짜리 3원짜리 우표 총 130장을 사고, 710 원을 지불 했을때, 몇개의 7원짜리 우표를 샀는가?



There are 250 stamps which are 4-cent stamps and 9-cent stamps. Altogether they cost 1600 cents. How many 4-cent stamps are there?



There are 260 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 1300 cents. How many 3-cent stamps are there?

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