711  Leg-Stamp
닭다리 개다리 2

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There are 150 heads of Chickens and Dogs together. Altogether there are 400 legs. How many chickens are there?



There are 160 heads of Chickens and Dogs together. Altogether there are 560 legs. How many chickens are there?



우리 안에 총 170 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 520 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



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



There are 150 heads of Chickens and Dogs together. Altogether there are 500 legs. How many chickens are there?

There are 140 stamps which are 3-cent stamps and 4-cent stamps. Altogether they cost 480 cents. How many 3-cent stamps are there?



There are 280 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 1510 cents. How many 4-cent stamps are there?



오늘 5원짜리 4원짜리 우표 총 220장을 사고, 990 원을 지불 했을때, 몇개의 5원짜리 우표를 샀는가?



There are 150 stamps which are 3-cent stamps and 9-cent stamps. Altogether they cost 870 cents. How many 3-cent stamps are there?



There are 170 stamps which are 3-cent stamps and 6-cent stamps. Altogether they cost 720 cents. How many 3-cent stamps are there?

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