406  Leg-Stamp
닭다리 개다리 2

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There are 90 heads of Chickens and Dogs together. Altogether there are 240 legs. How many chickens are there?



There are 150 heads of Chickens and Dogs together. Altogether there are 480 legs. How many chickens are there?



우리 안에 총 200 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 660 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 200 heads of Chickens and Dogs together. Altogether there are 620 legs. How many chickens are there?



There are 180 heads of Chickens and Dogs together. Altogether there are 600 legs. How many chickens are there?

There are 130 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 760 cents. How many 7-cent stamps are there?



There are 280 stamps which are 3-cent stamps and 6-cent stamps. Altogether they cost 1230 cents. How many 3-cent stamps are there?



오늘 6원짜리 5원짜리 우표 총 200장을 사고, 1150 원을 지불 했을때, 몇개의 6원짜리 우표를 샀는가?



There are 170 stamps which are 3-cent stamps and 9-cent stamps. Altogether they cost 1110 cents. How many 3-cent stamps are there?



There are 240 stamps which are 4-cent stamps and 9-cent stamps. Altogether they cost 1410 cents. How many 4-cent stamps are there?

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