404  Stamp
How many stamps? 2

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There are 240 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1900 cents. How many 7-cent stamps are there?



There are 180 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 980 cents. How many 6-cent stamps are there?



There are 140 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 1180 cents. How many 8-cent stamps are there?



There are 210 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 1230 cents. How many 8-cent stamps are there?



There are 260 stamps which are 6-cent stamps and 3-cent stamps. Altogether they cost 1230 cents. How many 6-cent stamps are there?

There are 250 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 1190 cents. How many 3-cent stamps are there?



There are 230 stamps which are 6-cent stamps and 3-cent stamps. Altogether they cost 1020 cents. How many 6-cent stamps are there?



오늘 4원짜리 3원짜리 우표 총 170 장을 사고, 620 원을 지불 했을때, 몇개의 4원짜리 우표를 샀는가?



There are 230 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 830 cents. How many 4-cent stamps are there?



There are 240 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 1240 cents. How many 3-cent stamps are there?

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