409  Stamp
How many stamps? 1

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There are 220 stamps which are 7-cent stamps and 6-cent stamps. Altogether they cost 1470 cents. How many 7-cent stamps are there?



There are 230 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 1250 cents. How many 6-cent stamps are there?



There are 210 stamps which are 6-cent stamps and 8-cent stamps. Altogether they cost 1440 cents. How many 6-cent stamps are there?



There are 250 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1950 cents. How many 7-cent stamps are there?



There are 120 stamps which are 3-cent stamps and 6-cent stamps. Altogether they cost 510 cents. How many 3-cent stamps are there?

There are 230 stamps which are 3-cent stamps and 7-cent stamps. Altogether they cost 1090 cents. How many 3-cent stamps are there?



There are 280 stamps which are 8-cent stamps and 3-cent stamps. Altogether they cost 1590 cents. How many 8-cent stamps are there?



There are 170 stamps which are 8-cent stamps and 5-cent stamps. Altogether they cost 1120 cents. How many 8-cent stamps are there?



There are 240 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 1770 cents. How many 6-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?

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