515  Leg-Stamp
닭다리 개다리 2

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There are 150 heads of Chickens and Dogs together. Altogether there are 440 legs. How many chickens are there?



There are 120 heads of Chickens and Dogs together. Altogether there are 400 legs. How many chickens are there?



우리 안에 총 170 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 560 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 90 heads of Chickens and Dogs together. Altogether there are 260 legs. How many chickens are there?



There are 180 heads of Chickens and Dogs together. Altogether there are 480 legs. How many chickens are there?

There are 210 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 970 cents. How many 4-cent stamps are there?



There are 200 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1640 cents. How many 7-cent stamps are there?



오늘 3원짜리 4원짜리 우표 총 220장을 사고, 760 원을 지불 했을때, 몇개의 3원짜리 우표를 샀는가?



There are 170 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 730 cents. How many 4-cent stamps are there?



There are 200 stamps which are 6-cent stamps and 3-cent stamps. Altogether they cost 870 cents. How many 6-cent stamps are there?

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