144  Stamp
How many stamps? 2

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There are 250 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 900 cents. How many 4-cent stamps are there?



There are 200 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 1470 cents. How many 8-cent stamps are there?



There are 200 stamps which are 7-cent stamps and 8-cent stamps. Altogether they cost 1480 cents. How many 7-cent stamps are there?



There are 260 stamps which are 3-cent stamps and 9-cent stamps. Altogether they cost 1440 cents. How many 3-cent stamps are there?



There are 170 stamps which are 4-cent stamps and 9-cent stamps. Altogether they cost 930 cents. How many 4-cent stamps are there?

There are 190 stamps which are 3-cent stamps and 4-cent stamps. Altogether they cost 670 cents. How many 3-cent stamps are there?



There are 190 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 1460 cents. How many 8-cent stamps are there?



오늘 8원짜리 7원짜리 우표 총 170 장을 사고, 1280 원을 지불 했을때, 몇개의 8원짜리 우표를 샀는가?



There are 180 stamps which are 7-cent stamps and 3-cent stamps. Altogether they cost 940 cents. How many 7-cent stamps are there?



There are 200 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 1080 cents. How many 3-cent stamps are there?

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