537  Leg-Stamp
닭다리 개다리 2

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There are 140 heads of Chickens and Dogs together. Altogether there are 400 legs. How many chickens are there?



There are 180 heads of Chickens and Dogs together. Altogether there are 520 legs. How many chickens are there?



우리 안에 총 170 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 580 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 260 heads of Chickens and Dogs together. Altogether there are 760 legs. How many chickens are there?



There are 210 heads of Chickens and Dogs together. Altogether there are 600 legs. How many chickens are there?

There are 220 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 1190 cents. How many 6-cent stamps are there?



There are 150 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 660 cents. How many 4-cent stamps are there?



오늘 6원짜리 4원짜리 우표 총 270장을 사고, 1360 원을 지불 했을때, 몇개의 6원짜리 우표를 샀는가?



There are 240 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1530 cents. How many 6-cent stamps are there?



There are 200 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 800 cents. How many 3-cent stamps are there?

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