606  Leg-Stamp
닭다리 개다리 2

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There are 170 heads of Chickens and Dogs together. Altogether there are 500 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?



우리 안에 총 250 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 760 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 110 heads of Chickens and Dogs together. Altogether there are 280 legs. How many chickens are there?



There are 170 heads of Chickens and Dogs together. Altogether there are 520 legs. How many chickens are there?

There are 150 stamps which are 3-cent stamps and 5-cent stamps. Altogether they cost 550 cents. How many 3-cent stamps are there?



There are 210 stamps which are 3-cent stamps and 6-cent stamps. Altogether they cost 840 cents. How many 3-cent stamps are there?



오늘 3원짜리 5원짜리 우표 총 200장을 사고, 700 원을 지불 했을때, 몇개의 3원짜리 우표를 샀는가?



There are 210 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 1070 cents. How many 7-cent stamps are there?



There are 170 stamps which are 3-cent stamps and 6-cent stamps. Altogether they cost 690 cents. How many 3-cent stamps are there?

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