572  Stamp
How many stamps? 1

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There are 210 stamps which are 6-cent stamps and 8-cent stamps. Altogether they cost 1480 cents. How many 6-cent stamps are there?



There are 190 stamps which are 5-cent stamps and 7-cent stamps. Altogether they cost 1070 cents. How many 5-cent stamps are there?



There are 240 stamps which are 6-cent stamps and 5-cent stamps. Altogether they cost 1340 cents. How many 6-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 210 stamps which are 4-cent stamps and 5-cent stamps. Altogether they cost 930 cents. How many 4-cent stamps are there?



There are 240 stamps which are 4-cent stamps and 7-cent stamps. Altogether they cost 1350 cents. How many 4-cent stamps are there?



There are 200 stamps which are 8-cent stamps and 9-cent stamps. Altogether they cost 1700 cents. How many 8-cent stamps are there?



There are 140 stamps which are 6-cent stamps and 9-cent stamps. Altogether they cost 990 cents. How many 6-cent stamps are there?



There are 190 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 1160 cents. How many 8-cent stamps are there?



There are 160 stamps which are 3-cent stamps and 4-cent stamps. Altogether they cost 560 cents. How many 3-cent stamps are there?



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572    100 130 140 140 120 ( 630 )   110 100 90 100 80 ( 480 )   [[ 1110 ]]