510  Stamp
How many stamps? 2

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There are 230 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 1180 cents. How many 4-cent stamps are there?



There are 210 stamps which are 3-cent stamps and 5-cent stamps. Altogether they cost 810 cents. How many 3-cent stamps are there?



There are 260 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 910 cents. How many 4-cent stamps are there?



There are 230 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 950 cents. How many 5-cent stamps are there?



There are 250 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 1240 cents. How many 4-cent stamps are there?



There are 230 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 1440 cents. How many 8-cent stamps are there?



There are 200 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 850 cents. How many 4-cent stamps are there?



오늘 6원짜리 9원짜리 우표 총 250 장을 사고, 1830 원을 지불 했을때, 몇개의 6원짜리 우표를 샀는가?



There are 190 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1370 cents. How many 8-cent stamps are there?



There are 210 stamps which are 7-cent stamps and 8-cent stamps. Altogether they cost 1550 cents. How many 7-cent stamps are there?



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510    100 120 130 130 130 ( 610 )   130 150 140 140 130 ( 690 )   [[ 1300 ]]