815  Stamp
How many stamps? 2

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There are 190 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 1220 cents. How many 8-cent stamps are there?



There are 160 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 1170 cents. How many 6-cent stamps are there?



There are 210 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 1030 cents. How many 3-cent stamps are there?



There are 220 stamps which are 4-cent stamps and 8-cent stamps. Altogether they cost 1200 cents. How many 4-cent stamps are there?



There are 210 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 730 cents. How many 4-cent stamps are there?



There are 190 stamps which are 4-cent stamps and 9-cent stamps. Altogether they cost 1210 cents. How many 4-cent stamps are there?



There are 240 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 1800 cents. How many 6-cent stamps are there?



오늘 8원짜리 9원짜리 우표 총 250 장을 사고, 2100 원을 지불 했을때, 몇개의 8원짜리 우표를 샀는가?



There are 230 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1450 cents. How many 8-cent stamps are there?



There are 160 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 1050 cents. How many 7-cent stamps are there?



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815    130 90 110 140 100 ( 570 )   100 120 150 100 90 ( 560 )   [[ 1130 ]]