536  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 460 legs. How many chickens are there?

There are 230 stamps which are 6-cent stamps and 3-cent stamps. Altogether they cost 1110 cents. How many 6-cent stamps are there?



There are 140 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1000 cents. How many 8-cent stamps are there?



오늘 7원짜리 5원짜리 우표 총 130장을 사고, 810 원을 지불 했을때, 몇개의 7원짜리 우표를 샀는가?



There are 220 stamps which are 3-cent stamps and 5-cent stamps. Altogether they cost 820 cents. How many 3-cent stamps are there?



There are 130 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 630 cents. How many 3-cent stamps are there?

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