540  Stamp
How many stamps? 2

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There are 150 stamps which are 7-cent stamps and 8-cent stamps. Altogether they cost 1100 cents. How many 7-cent stamps are there?



There are 220 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 1230 cents. How many 6-cent stamps are there?



There are 140 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 610 cents. How many 4-cent stamps are there?



There are 230 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 6-cent stamps and 8-cent stamps. Altogether they cost 1740 cents. How many 6-cent stamps are there?



There are 240 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1600 cents. How many 5-cent stamps are there?



There are 170 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 800 cents. How many 4-cent stamps are there?



오늘 6원짜리 7원짜리 우표 총 210 장을 사고, 1370 원을 지불 했을때, 몇개의 6원짜리 우표를 샀는가?



There are 200 stamps which are 6-cent stamps and 4-cent stamps. Altogether they cost 1100 cents. How many 6-cent stamps are there?



There are 160 stamps which are 6-cent stamps and 3-cent stamps. Altogether they cost 720 cents. How many 6-cent stamps are there?



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540    100 130 90 130 130 ( 580 )   140 110 100 150 80 ( 580 )   [[ 1160 ]]