151  Stamp
How many stamps? 2

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There are 250 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 1100 cents. How many 4-cent stamps are there?



There are 200 stamps which are 3-cent stamps and 4-cent stamps. Altogether they cost 690 cents. How many 3-cent stamps are there?



There are 220 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1380 cents. How many 5-cent stamps are there?



There are 170 stamps which are 5-cent stamps and 6-cent stamps. Altogether they cost 920 cents. How many 5-cent stamps are there?



There are 230 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 1090 cents. How many 3-cent stamps are there?

There are 140 stamps which are 7-cent stamps and 4-cent stamps. Altogether they cost 830 cents. How many 7-cent stamps are there?



There are 210 stamps which are 4-cent stamps and 9-cent stamps. Altogether they cost 1140 cents. How many 4-cent stamps are there?



오늘 3원짜리 8원짜리 우표 총 260 장을 사고, 1430 원을 지불 했을때, 몇개의 3원짜리 우표를 샀는가?



There are 210 stamps which are 3-cent stamps and 6-cent stamps. Altogether they cost 990 cents. How many 3-cent stamps are there?



There are 250 stamps which are 3-cent stamps and 4-cent stamps. Altogether they cost 870 cents. How many 3-cent stamps are there?

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