137  Stamp
How many stamps? 2

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There are 240 stamps which are 3-cent stamps and 6-cent stamps. Altogether they cost 990 cents. How many 3-cent stamps are there?



There are 180 stamps which are 3-cent stamps and 4-cent stamps. Altogether they cost 590 cents. How many 3-cent stamps are there?



There are 230 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 1330 cents. How many 5-cent stamps are there?



There are 150 stamps which are 3-cent stamps and 6-cent stamps. Altogether they cost 630 cents. How many 3-cent stamps are there?



There are 220 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 1340 cents. How many 5-cent stamps are there?

There are 200 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 1540 cents. How many 8-cent stamps are there?



There are 250 stamps which are 5-cent stamps and 8-cent stamps. Altogether they cost 1550 cents. How many 5-cent stamps are there?



오늘 7원짜리 4원짜리 우표 총 170 장을 사고, 980 원을 지불 했을때, 몇개의 7원짜리 우표를 샀는가?



There are 240 stamps which are 3-cent stamps and 6-cent stamps. Altogether they cost 990 cents. How many 3-cent stamps are there?



There are 260 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 1690 cents. How many 7-cent stamps are there?

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