499  Stamp
How many stamps? 2

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There are 260 stamps which are 3-cent stamps and 5-cent stamps. Altogether they cost 1000 cents. How many 3-cent stamps are there?



There are 200 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 780 cents. How many 5-cent stamps are there?



There are 200 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 730 cents. How many 4-cent stamps are there?



There are 180 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 720 cents. How many 5-cent stamps are there?



There are 160 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 710 cents. How many 4-cent stamps are there?



There are 220 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 860 cents. How many 5-cent stamps are there?



There are 220 stamps which are 3-cent stamps and 9-cent stamps. Altogether they cost 1140 cents. How many 3-cent stamps are there?



오늘 3원짜리 9원짜리 우표 총 210 장을 사고, 1290 원을 지불 했을때, 몇개의 3원짜리 우표를 샀는가?



There are 180 stamps which are 6-cent stamps and 4-cent stamps. Altogether they cost 980 cents. How many 6-cent stamps are there?



There are 180 stamps which are 4-cent stamps and 9-cent stamps. Altogether they cost 1170 cents. How many 4-cent stamps are there?



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499    150 90 130 90 90 ( 550 )   100 140 100 130 90 ( 560 )   [[ 1110 ]]