Question

In which of these cases is each stamp worth the most?
7 of the same stamp worth a total of $3.15
8 of the same stamp worth a total of $3.20
10 of the same stamp worth a total of $4.10
16 of the same stamp worth a total of $4.80

Answer 1

Compute the unit price (in dollars or cents):

- $3.15 ÷ 7 = $0.45 (45¢)
- $3.20 ÷ 8 = $0.40 (40¢)
- $4.10 ÷10 = $0.41 (41¢)
- $4.80 ÷16 = $0.30 (30¢)

So each stamp is worth the most in the first case: 7 for $3.15 (45¢ each).