No. XXXIII.—CHESS CAMEO
By B. G. Laws
A Prize Problem
BLACK
WHITE
White to play, and mate in two moves.
PERFECT NUMBERS
The following particulars about a very rare property of numbers will be new and interesting to many of our readers:—
The number 6 can only be divided without remainder by 1, 2, and 3, excluding 6 itself. The sum of 1 + 2 + 3 is 6. The only exact divisors of 28 are 1, 2, 4, 7, and 14, and the sum of these is 28; 6 and 28 are therefore known as perfect numbers.