The product of the first twelve prime numbers, 1, 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, can be written down by using no figures but 0, 1, 2, and 3, and of these 2 and 3 once only, thus—
10 × 1001 × 2001 × 10013:—
or
10 = 1 × 2 × 5
1001 = 7 × 11 × 13
2001 = 3 × 23 × 29
10013 = 17 × 19 × 31
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10
The question—
Six collars seven cuffs there be
When pence we charge you thirty-three;
Seven collars and six cuffs to do,
The charge is only thirty-two;
The work is good and up-to-date,
So figure out in pence the rate.
is answered by—Collars, 2d. Cuffs, 3d.
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