Reciprocals of Odd Numbers adding to 1/Mistake

Source Work

 * The Dictionary
 * $105$
 * $105$


 * The Dictionary
 * $105$
 * $105$

Mistake

 * There are $4$ ways of representing $1$ as the sum of odd reciprocals, using only $9$ of them ...

There are in fact $5$ such ways, as can be seen in Reciprocals of Odd Numbers adding to 1.