861  Leg-Stamp
닭다리 개다리 2

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There are 160 heads of Chickens and Dogs together. Altogether there are 400 legs. How many chickens are there?



There are 200 heads of Chickens and Dogs together. Altogether there are 520 legs. How many chickens are there?



우리 안에 총 190 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 560 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 130 heads of Chickens and Dogs together. Altogether there are 360 legs. How many chickens are there?



There are 250 heads of Chickens and Dogs together. Altogether there are 720 legs. How many chickens are there?

There are 210 stamps which are 6-cent stamps and 8-cent stamps. Altogether they cost 1380 cents. How many 6-cent stamps are there?



There are 180 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 1320 cents. How many 6-cent stamps are there?



오늘 7원짜리 3원짜리 우표 총 190장을 사고, 890 원을 지불 했을때, 몇개의 7원짜리 우표를 샀는가?



There are 180 stamps which are 3-cent stamps and 8-cent stamps. Altogether they cost 1090 cents. How many 3-cent stamps are there?



There are 250 stamps which are 6-cent stamps and 4-cent stamps. Altogether they cost 1280 cents. How many 6-cent stamps are there?

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