S in a GLetter Equations are well known phrases or facts where the key words have been replaced with the first letter of that word. These are often in the form of an equation, which contain a number, an = sign and the rest of the obscured phrase or fact.
21 = S in a G
HintOld British money.
AnswerThere are 21 shillings in a guinea.
The guinea was made from gold, imported from The Republic of Guinea, and was originally supposed to be of a value of one British Sterling Pound, or 20 shillings. However, due to the varying price of gold, the value of the guinea changed often, sometimes as high as 30 shillings.
The first guinea was produced in 1663, and the last was made in 1813. The guinea is now obsolete, but after minting of the coin stopped, the value was fixed at 1 pound and 1 shilling, or 21 shillings.
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