721  Stamp
How many stamps? 1

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There are 180 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 1380 cents. How many 8-cent stamps are there?



There are 200 stamps which are 5-cent stamps and 3-cent stamps. Altogether they cost 800 cents. How many 5-cent stamps are there?



There are 240 stamps which are 5-cent stamps and 6-cent stamps. Altogether they cost 1320 cents. How many 5-cent stamps are there?



There are 160 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 900 cents. How many 5-cent stamps are there?



There are 180 stamps which are 4-cent stamps and 3-cent stamps. Altogether they cost 660 cents. How many 4-cent stamps are there?

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



There are 170 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 970 cents. How many 6-cent stamps are there?



There are 240 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 1350 cents. How many 6-cent stamps are there?



There are 240 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 1090 cents. How many 4-cent stamps are there?



There are 250 stamps which are 3-cent stamps and 5-cent stamps. Altogether they cost 950 cents. How many 3-cent stamps are there?

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