992  Leg-Stamp
닭다리 개다리 2

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There are 200 heads of Chickens and Dogs together. Altogether there are 520 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 200 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 540 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



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



There are 150 heads of Chickens and Dogs together. Altogether there are 460 legs. How many chickens are there?

There are 250 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 1120 cents. How many 4-cent stamps are there?



There are 150 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 870 cents. How many 5-cent stamps are there?



오늘 4원짜리 6원짜리 우표 총 230장을 사고, 1180 원을 지불 했을때, 몇개의 4원짜리 우표를 샀는가?



There are 190 stamps which are 5-cent stamps and 6-cent stamps. Altogether they cost 1030 cents. How many 5-cent stamps are there?



There are 200 stamps which are 3-cent stamps and 4-cent stamps. Altogether they cost 650 cents. How many 3-cent stamps are there?

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