Index

Amicable numbers, 53, 90 Fermat, 37, 47, 54

Apocalyptic Number, 158 Fibonacct numbers, 118
Archimedes, 114 Fractional numbers, 14, 15
Automorphic numbers, go Fractions, continued, 114-22
Bachet, 172 Gauss, 108

Beast, Number of, 158, 160

Binomial theorem, 31, 161 Hexagonal numbers, 28, 29, 44
Calculating prodigies, 133—4 Imaginary numbers, 112, 122—
Calendar, continuous, 169 124

Combinations, 165 Infinitude of numbers, 15
Composite numbers, 55-63 Infinity, 13

Congruences, 108-11 Integral numbers, 14, 15
Continued fractions, 11422 Irrationals, 15, 112

‘Counting cards’, 132

Counting methods, 9 Logarithms, 81-6, 139

Cubes, 17, 27-30, 337, 43
MacMahon, Major, 172

Decimals, 15, 16 Magic squares, 145-55
Decimals, cycles, 15, 50,94-107  Mersenne’s numbers, 54
Digital roots, 38, 98, 131 Modulus, 108
Digits, Grouping of, 10, 126 Multiplication, 72-80
Digit symbols, 11
Divisibility, 48, 6471, 109 Napier, 83
Natural numbers, 63
e, 121-3 Negative numbers, 12, 14, 15
Eratosthenes, Sieve of, 46 Notation, scales of, 11, 159 1
Euclid, 49, 52, 87, 112 Nought, 12 :
Euler, 49, 52, 54, 121-3 Number mystery, 156-60 F:
Number origins, 9 5
Factorial numbers, 31 Numerology, 159-60 ;
Factors, 46-63, 87—90 =
Fallacies, 135-44 Oblong numbers, 26 £
175
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