231  Stamp
How many stamps? 2

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There are 170 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1120 cents. How many 6-cent stamps are there?



There are 210 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 1320 cents. How many 5-cent stamps are there?



There are 260 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 1430 cents. How many 6-cent stamps are there?



There are 200 stamps which are 7-cent stamps and 8-cent stamps. Altogether they cost 1450 cents. How many 7-cent stamps are there?



There are 220 stamps which are 4-cent stamps and 8-cent stamps. Altogether they cost 1160 cents. How many 4-cent stamps are there?

There are 160 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 1110 cents. How many 6-cent stamps are there?



There are 180 stamps which are 4-cent stamps and 8-cent stamps. Altogether they cost 1120 cents. How many 4-cent stamps are there?



오늘 6원짜리 4원짜리 우표 총 130 장을 사고, 660 원을 지불 했을때, 몇개의 6원짜리 우표를 샀는가?



There are 270 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1750 cents. How many 6-cent stamps are there?



There are 150 stamps which are 6-cent stamps and 8-cent stamps. Altogether they cost 1040 cents. How many 6-cent stamps are there?

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