522  Leg-Stamp
닭다리 개다리 2

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There are 100 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 620 legs. How many chickens are there?



우리 안에 총 160 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 440 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 90 heads of Chickens and Dogs together. Altogether there are 280 legs. How many chickens are there?



There are 190 heads of Chickens and Dogs together. Altogether there are 640 legs. How many chickens are there?

There are 180 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 1240 cents. How many 8-cent stamps are there?



There are 170 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 1150 cents. How many 5-cent stamps are there?



오늘 3원짜리 6원짜리 우표 총 170장을 사고, 780 원을 지불 했을때, 몇개의 3원짜리 우표를 샀는가?



There are 180 stamps which are 3-cent stamps and 6-cent stamps. Altogether they cost 750 cents. How many 3-cent stamps are there?



There are 270 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 1610 cents. How many 5-cent stamps are there?

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