Puzzle Solutions, Issue 05

The answers to the puzzles that appeared in issue 05

These solutions relate to puzzles found in Issue 05 of the magazine.

Largest odd factors

The result will always be $n^2$.

Square factorials

$\displaystyle\frac{1!\times2!\times3!\times…\times100!}{50!}$ is a square number.

• Book of the Year 2019

We announce the winner of this coveted prize