311  Stamp
How many stamps? 1

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There are 190 stamps which are 6-cent stamps and 7-cent stamps. Altogether they cost 1240 cents. How many 6-cent stamps are there?



There are 160 stamps which are 6-cent stamps and 8-cent stamps. Altogether they cost 1100 cents. How many 6-cent stamps are there?



There are 180 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 1010 cents. How many 6-cent stamps are there?



There are 200 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 890 cents. How many 4-cent stamps are there?



There are 270 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 1630 cents. How many 7-cent stamps are there?

There are 160 stamps which are 3-cent stamps and 6-cent stamps. Altogether they cost 660 cents. How many 3-cent stamps are there?



There are 170 stamps which are 4-cent stamps and 6-cent stamps. Altogether they cost 800 cents. How many 4-cent stamps are there?



There are 200 stamps which are 8-cent stamps and 7-cent stamps. Altogether they cost 1500 cents. How many 8-cent stamps are there?



There are 200 stamps which are 6-cent stamps and 4-cent stamps. Altogether they cost 980 cents. How many 6-cent stamps are there?



There are 200 stamps which are 4-cent stamps and 8-cent stamps. Altogether they cost 1080 cents. How many 4-cent stamps are there?

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