Common · Knowledge
Postage stamp problem
Mathematical riddle
The postage stamp problem is a mathematical riddle that asks what is the smallest postage value which cannot be placed on an envelope, if the latter can hold only a limited number of stamps, and these may only have certain specified face values. For example, suppose the envelope can hold only three stamps, and the available stamp values are 1 cent, 2 cents, 5 cents, and 20 cents.
From Wikipedia
The postage stamp problem is a mathematical riddle that asks what is the smallest postage value which cannot be placed on an envelope, if the latter can hold only a limited number of stamps, and these may only have certain specified face values. For example, suppose the envelope can hold only three stamps, and the available stamp values are 1 cent, 2 cents, 5 cents, and 20 cents. Then the solution is 13 cents; since any smaller value can be obtained with at most three stamps (e.g. 4 = 2 + 2, 8 = 5 + 2 + 1, etc.), but to get 13 cents one must use at least four stamps.
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Postage stamp
Small piece of paper that is purchased and displayed on an item of mail as evidence of payment of postage
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language of stamps
Position and angle of the stamp on the envelope or postcard was supposed to relay a message to the receiver
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Constant problem
Problem of deciding whether an expression equals zero
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Christmas stamp
Stamp issued during the Christmas season
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Postage stamp separation
Means by which postage stamps in a sheet are separated from each other
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Sheet of stamps