670  Stamp
How many stamps? 2

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There are 200 stamps which are 3-cent stamps and 9-cent stamps. Altogether they cost 960 cents. How many 3-cent stamps are there?



There are 260 stamps which are 6-cent stamps and 3-cent stamps. Altogether they cost 1200 cents. How many 6-cent stamps are there?



There are 160 stamps which are 5-cent stamps and 9-cent stamps. Altogether they cost 1040 cents. How many 5-cent stamps are there?



There are 230 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1850 cents. How many 7-cent stamps are there?



There are 200 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 1120 cents. How many 6-cent stamps are there?



There are 200 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 1070 cents. How many 6-cent stamps are there?



There are 170 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 960 cents. How many 6-cent stamps are there?



오늘 4원짜리 6원짜리 우표 총 190 장을 사고, 960 원을 지불 했을때, 몇개의 4원짜리 우표를 샀는가?



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 250 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 1050 cents. How many 5-cent stamps are there?



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670    140 140 100 110 120 ( 610 )   70 110 90 110 150 ( 530 )   [[ 1140 ]]