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Taylor - Theoretic Arithmetic.pdf - Platonic Philosophy

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any triangular gnomon, and unity is added to the prduct, the<br />

sum will be an heptagonal gnomon. For,<br />

1<br />

5x1 and +1= 6 the 2nd<br />

5x2 and +1=11 the 3rd<br />

5x3 and +1=16 the 4th heptagonal gnomon.<br />

5x4 and +1=21 the 5th<br />

5x5 and +1=26 the 6th<br />

&c.<br />

Farther still, I have found that if 5 multiplies any hexagonal<br />

gnomon, and unity is added to the product the sum will also be<br />

an heptagonal gnomon. For,<br />

5X 1 and +1= 6 the 2nd<br />

1<br />

5X 5 and +1=26 the 6th heptagonal gnomon.<br />

5X 9 and 1=46 the 10th<br />

5 X 13 and + 1=66 the 14th J<br />

&c.<br />

Likewise, if 5 multiplies any hexagon, and unity is added to the<br />

product, the sum will be an heptagonal gnomon. Thus,<br />

5X 1 and +1= 6 the 2nd]<br />

5X 6 and +1=31 the 7th heptagonal gnomon.<br />

5x15 and +1=76 the 16th J<br />

&c.<br />

Again, if 5 multiplies any one of the squares 1, 4, 9, 16, &c.<br />

and unity is added to the product the sum will also be an heptagonal<br />

gnomon. For,<br />

5x1 and +1= 6 the 2nd)<br />

5x4 and +1=21 the 5th<br />

1<br />

heptagonal gnomon.<br />

5x9 and +l=46 the 10th<br />

&c.<br />

And in thc last placc, if 5 multiplies any gnomon of a square,<br />

and unity is added to the product, the sum will be an heptagonal<br />

gnomon. For,<br />

5x1 and +1= 6 the 2nd)<br />

5X 3 and +1=16 the 4th<br />

1<br />

heptagonal gnomon.<br />

5x5 and +1=26 the 6th<br />

kc.

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