999  Stamp
How many stamps? 2

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There are 220 stamps which are 8-cent stamps and 6-cent stamps. Altogether they cost 1620 cents. How many 8-cent stamps are there?



There are 240 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 1070 cents. How many 4-cent stamps are there?



There are 200 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 1380 cents. How many 6-cent stamps are there?



There are 200 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1440 cents. How many 5-cent stamps are there?



There are 190 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 1290 cents. How many 6-cent stamps are there?



There are 220 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 1160 cents. How many 8-cent stamps are there?



There are 220 stamps which are 5-cent stamps and 4-cent stamps. Altogether they cost 1030 cents. How many 5-cent stamps are there?



오늘 4원짜리 8원짜리 우표 총 230 장을 사고, 1440 원을 지불 했을때, 몇개의 4원짜리 우표를 샀는가?



There are 160 stamps which are 7-cent stamps and 8-cent stamps. Altogether they cost 1180 cents. How many 7-cent stamps are there?



There are 220 stamps which are 3-cent stamps and 4-cent stamps. Altogether they cost 750 cents. How many 3-cent stamps are there?



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999    150 130 140 90 140 ( 650 )   100 150 100 100 130 ( 580 )   [[ 1230 ]]