699  Leg-Stamp
닭다리 개다리 2

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There are 150 heads of Chickens and Dogs together. Altogether there are 400 legs. How many chickens are there?



There are 260 heads of Chickens and Dogs together. Altogether there are 760 legs. How many chickens are there?



우리 안에 총 230 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 660 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 120 heads of Chickens and Dogs together. Altogether there are 400 legs. How many chickens are there?



There are 130 heads of Chickens and Dogs together. Altogether there are 340 legs. How many chickens are there?

There are 250 stamps which are 3-cent stamps and 6-cent stamps. Altogether they cost 1110 cents. How many 3-cent stamps are there?



There are 150 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 810 cents. How many 4-cent stamps are there?



오늘 3원짜리 6원짜리 우표 총 190장을 사고, 930 원을 지불 했을때, 몇개의 3원짜리 우표를 샀는가?



There are 240 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1640 cents. How many 5-cent stamps are there?



There are 150 stamps which are 3-cent stamps and 6-cent stamps. Altogether they cost 630 cents. How many 3-cent stamps are there?

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