Volume 14

1978

Issue 1

Consider the quadratic $x^2+x+1$. By substituting $x=1,2,3,\cdots$ we can form a sequence $$x^2+x+1 : 3, 7, 13, 21, 31, \cdots$$

Issue 2

The marvellous formula of Euler, $V-E+F=2$, can yield interesting results other than that concerning the Platonic Solids.

Issue 3

Several thousand years ago, magic squares were being used by Indian astrologers in their calculations of horoscopes.