661  Stamp
How many stamps? 2

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There are 120 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 530 cents. How many 4-cent stamps are there?



There are 230 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 800 cents. How many 4-cent stamps are there?



There are 220 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 1360 cents. How many 8-cent stamps are there?



There are 210 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 1130 cents. How many 8-cent stamps are there?



There are 190 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 1150 cents. How many 7-cent stamps are there?



There are 250 stamps which are 3-cent stamps and 6-cent stamps. Altogether they cost 1140 cents. How many 3-cent stamps are there?



There are 170 stamps which are 6-cent stamps and 8-cent stamps. Altogether they cost 1220 cents. How many 6-cent stamps are there?



오늘 8원짜리 3원짜리 우표 총 230 장을 사고, 1240 원을 지불 했을때, 몇개의 8원짜리 우표를 샀는가?



There are 150 stamps which are 6-cent stamps and 3-cent stamps. Altogether they cost 720 cents. How many 6-cent stamps are there?



There are 210 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 1280 cents. How many 8-cent stamps are there?



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661    70 110 140 100 100 ( 520 )   120 70 110 90 110 ( 500 )   [[ 1020 ]]