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A Guide to the Maths in the MM books
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Nearly everything in school-level maths is either covered by the Murderous Maths books or this website. This A-Z guide either suggests which book a topic can be found in, or it links to the relevant page on this site.

The titles of the MM books are abbreviated as follows:

MM1 = Murderous Maths
MM2 = More Murderous Maths
ESSAR = The Essential Arithmetricks
MANDV = The Mean and Vulgar Bits fractions
DMEAS = Desperate Measures
LUCKY = Do You Feel Lucky? probability
VCIR = Vicious Circles
NUM = Numbers the Key to the Universe
PHX = The Phantom X algebra
FANG = The Fiendish Angletron trigonometry
PSAUS = The Perfect Sausage formulas
CODES = Codes - how to make and break them
SUD = SuDoku
KAK = Kakuro
DBB = Professor Fiendish's DIABOLICAL BRAINBENDERS
The page numbers apply to the English language editions.

A-Z Index

a b c d e f g h i k l m n o p q r s t u v w y z

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9: NUM 151-163

11: When will a number divide by 11?

13: fear of NUM 78-89

37: NUM 37

1089: MM1 78-80, 1089

4 4's: Sunny's 4x4 Challenge


Abacus: MM1 33-34

Acceleration: PSAUS 46-54

Accuracy: measurement DMEAS 27

Addition: ESSAR 19-31

Algebra: PHX (entire book), card trick MM1 116-124

Alternate Segment: The Alternate Segment Theorem & Proof

Amicable numbers: NUM 148-150

Angles: DMEAS 115-126, MM1 73-78, opposite, corresponding VCIR 16-17, very small FANG 138-158

Angstrom: DMEAS 21

Annulus: formula PSAUS 163-165, The area of an ANULUS

Archimedes: principle DMEAS 135-144, MM1 10, DMEAS 150-157, sphere formula PSAUS 167-170

Arcsecond: FANG 138-139

AREA: formulas PSAUS 10, 116-142, measuring DMEAS 92-110, Area calculator

Articles: Stories from "The Week" that amused us, The Cicadas 17-year Life Cycle, The Al-Gebra Movement

Astonomical Unit (au): FANG 155

Averages: MANDV 124-156


Babylonians: NUM 128

Base 8: NUM 126-127

Bear Hunter Puzzle: VCIR 63-65, The Bear Hunter Puzzle

Bearings and navigation: FANG 181-196

Bell ringing: LUCKY 99-103

Big numbers: MM1 130-135

Binary: NUM 130-133, code CODES 18-24,

Birthdays: chances of sharing LUCKY 125-128

Bisecting lines and angles: MM2 113-119, lines VCIR 22-26, angles VCIR 26-27

Brackets: PHX 22-24, ESSAR 167-168

Buoyancy: DMEAS 146-149


Cake: dividing fairly VCIR 51-60

Calculator: getting sin, cos, tan values FANG 75-87

Calculators (online): Area calculator, LCD and HCF, Prime Number calculator, Age calculator, Time calculator, Quadratic calculator, Friday 13th calculator

Calculus: there is an introduction and explanation in "Isaac Newton and His Apple" by Kjartan Poskitt. differential calculus 56-63, integral calculus 92-94

Calendar: Babylonian Julian Gregorian DMEAS 159, The Calendar Trick

Cancelling fractions: MANDV 56-63

Cards (playing cards): LUCKY 128-136, algebra trick MM1 116-124, The Chances of Card Hands, How many different ways can you put a pack of cards in order?

Centred Hexagon Numbers: NUM 60-62, PSAUS 19

Chance: LUCKY (whole book), The Chances of Card Hands, The National Lottery Odds

Chords (of circles): VCIR 106-113, PSAUS 155

Cicidas: The Cicadas 17-year Life Cycle

CIRCLES: VCIR 100-120, PSAUS 152-157, The Names of Bits of Circles Quiz, How to find the centre of a circle using a book

Clocks: MM1 60-71

Codes: CODES (whole book)

Coefficients: PHX 12, Pascal coefficients PHX 100-107

Coin tossing: LUCKY 18-23, 40-43, 44-60, 63-66, 68, 70-77

Coin Tricks/Problems: DBB 52-53, 82, The Coin Pyramid (Tower of Hanoi), The 6 Coin Circle Problem, The Twelve Coin Balance Problem (and solution)

Combinations: LUCKY 78-103, PSAUS 106-108, The Unknown (Combinations) Formula

Compass: bearings and navigation FANG 181-196

Compasses: circles, bisecting lines and angles MM2 111-119

Cone: PSAUS 172

Conversions: PSAUS 195, angles dms calculator button FANG 141

Co-ordinates: PHX 128-142

Cos: FANG 67-68, 60º, 0º, 90º, 45º FANG 93, cosine formula FANG 119-123

Crescent areas: PSAUS 158-161

Cube (solid): formulas PSAUS 10, 143-146, The Magical Self-Assembling Cube!

Cube (x3): NUM 57-60, curve on graphs PHX 142

Cyclic Quadrilateral: VCIR 103-105


Day of Week algorithm: PSAUS 95-100

Decimal fractions: MANDV 100-111

Decimal point: ESSAR 163

Density: DMEAS 145-146, PSAUS 201

Diagonals: PSAUS rectangle 10, 13, polygons 123, 124, cuboids 144, Diagonals of Polygons (with proof)

Dice: LUCKY 23-25, 104-125, VCIR 128-133, puzzle DBB 100-102

Difference of two squares: NUM 50-52, PHX 108-110

Dimension 1D 2D 3D: MM2 33-43, 3D Noughts and Crosses Game

Division: ESSAR 107-134

Dms: calculator button FANG 141

Dodecahedron: PSAUS 149, VCIR 121, 127, 131, 135

Dominoes: MM2 13-23

Drawing: triangles FANG 38-45


e : NUM 178-183

Egyptian fractions: MANDV 86-87

Einstein, Albert: PSAUS 65, 69

Ellipses: VCIR 137-147, how to draw VCIR 141-143, formulas PSAUS 180-182, The Area of an Ellipse and Volume of Ellipsoids

Equations: PHX 19-45, quadratic PHX 56-66, simultaneous PHX 147-156, names of different types MM1 94,

Equilateral triangle: VCIR 31, how to draw with ruler and compasses VCIR 74 how to fold from paper VCIR 96

Estimating: ESSAR 153-162

Euler: solids formula VCIR 123, e,i,PI formula NUM 186

Exam tips: GCSE Slips and Tips (exam help)

Expanding (brackets): PHX 48-52


Factorial: ESSAR 166-167, LUCKY 79-81

Factorising: algebra PHX 48-52, into prime factors MANDV 45-48, 53-55

Facts (pathetic): NUM 9-16, 191-192, The Most Pathetic Facts in Maths

Fermat's Last Theorem: NUM 66-70

Fibonacci: NUM 17-41, Fibonacci trick NUM 40-41, PHX 78, formula PSAUS 203, Fibonacci and Nature

Finger Times Tables: NUM 119-122, Finger Times Tables

Flexagons: How to make Flexagons

Fortune Telling with numbers: NUM 71-76

Fractions: MANDV whole book, ESSAR 112-114,


g Gravity: PSAUS 55, 63. For a lot more information on gravity and forces, see "Isaac Newton and His Apple" by Kjartan Poskitt 69-85, 154-157

Geometry set: FANG 12-19

Gigameter: DMEAS 48

Gradients (on graphs): PHX 134

Graphs: x and y axis and how to plot for equations PHX 132-143


HCF: MANDV 52

Hemisphere: PSAUS 171

Hexagon: how to draw VCIR 73, how to fold from paper VCIR 97, tessalation VCIR 85,

Hypotenuse: FANG 60


i : NUM 183-186, square root of i The Research Lab

Icosahedron: PSAUS 149, VCIR 121, 125, 127, 131

Illusion: MM2 43, The Football Team Illusion, Lil's Missing Card Illusion, Sam Loyd's Get Off The Earth Puzzle Akiyoshi Kitaoka's Distorted Squares

Imperial units: DMEAS 30-45

Infinity: NUM 7-9, 188-190

Inscribed circle: PSAUS 118

INT function (integer division): PSAUS 97

Interest (money): PSAUS 82-94

Irrational numbers: NUM 164-173

Isosceles triangle: VCIR 11, 31-32


Kaprekar: NUM 115

Kepler: PSAUS 62

Kjarposko Puzzles: KAK, The Dreaded Kjarposkos


LCD: MANDV 64-73, 78-80

Light year: FANG 155-156, DMEAS 21

Line, area, volume: MM2 24-54

Locus: VCIR 21-22

Logic Problems: DBB, Dolly's Rush Hour, Luigi's Outside Table

Long Division: ESSAR 123-126,

Lottery: LUCKY 93-94, The National Lottery Odds

Lucky numbers: NUM 76-77


Magic Squares: MM1 103-106, How to make 5x5 and 7x7 Magic Squares, How to make 4x4 Magic Squares

Mathematicians: MM1 81-97

Mean: averages MANDV 124-156

Measurements: DMEAS whole book, MM2 44-54

Median: MANDV 146-149

Mersenne Primes: NUM 100-103, 142-144 The Research Lab

Metric System: DMEAS 45-51

Mirror numbers: MM2 107-108

Mobius strip: MM2 74-80

Mode: MANDV 143-146

Modulus (MOD function): PSAUS 98, CODES 148-149, The Modulus 105 Trick

Money: PSAUS 70-94, interest and e NUM 180-183, history ESSAR 135-144

Multiplication: ESSAR 93-101

Mutually exclusive outcomes: LUCKY 106


Nanometer: DMEAS 47

Nets (of solids): VCIR 128-136 the 11 nets of a cube see: The Research Lab

Newton: PSAUS 64-65. For a lot more information on forces, see "Isaac Newton and His Apple" by Kjartan Poskitt 144-157

Numbers: NUM, The link between Squared Triangle and Cube Numbers

Number tricks: The 7-11-13 trick, The Impossible Guess, The Missing Digit Trick, Riverboat Lil's Mindreader trick


Octahedron: PSAUS 149, VCIR 121. 125, 127, 133-134

Odd and Even numbers: ESSAR 15-16

Odds: LUCKY 38-39, 153-161


Palindrome numbers: MM2 107-108

Parabola: x2 graphs PHX 139- 144

Parallax: FANG 150, 153

Parallelogram: PSAUS 134

Parallel lines: how to draw FANG 18

Parsecs: FANG 155-158

Pascal's Triangle: for coefficients of (a+b)n PHX 100, probability LUCKY 61-77, combinations LUCKY 96-99, Pascal's Triangle How to get Fibonacci series see THE RESEARCH LAB

Pendulums: PSAUS 68

Penrose Roger: tiles VCIR 90-91, The Penrose Chickens

Pentagon: how to fold from paper VCIR 97-98

Pentagonal Number: PSAUS 19

Pentominoes: MM2 16-20

Percentages: PSAUS 72, MANDV 112-117

Perfect Numbers: NUM 136-146

Perimeter: PSAUS 12, 116, MM2 99-106

Permutations: PSAUS 103-105, LUCKY 81-88, DBB 46-47

Perpendicular bisector: VCIR 22-26

PI: NUM 174-178, PSAUS 15, 150-152, LUCKY 143-147, MM2 89-94

Picometer: DMEAS 47

Pizza cutting: PSAUS 31, Chopping Pizzas

Polygons: VCIR 56-99, PSAUS 116-126, tan area formula FANG 126-128, The Research Lab

Powers: ESSAR 168-169, MM1 15-18

Prime factors: MANDV 43-48

PRIME NUMBERS: explanation MANDV 40-44, NUM 90-112, MM1 46-51, Sudoku prime SUD 126, use in codes CODES 148-149, The Prime Numbers Trick, The Prime Counter Mersenne Primes NUM 100, 142 The Research Lab

Profit: PSAUS 70-74

Proportion: FANG 30-31

Protractor: DMEAS 120-121, FANG 16-17

Puzzles: DBB whole book, SUD, KAK, Dreaded Kjarposkos, Murderous Brainbending Puzzles

Pyramid: PSAUS 10, 146

Pythagoras: MM2 81-88 theorem proof VCIR 148-159


Quadratics: solving equations and formula PHX 53-66, PSAUS 138, Solving Quadratics by Completing the Square, Quadratic calculator


Radians: DMEAS 124

Ratios: FANG 30-37, trigonometry FANG 59

Rectangle: formulas PSAUS 10-13

Reducing fractions: MANDV 49-51

Regions: Surprising Regions Formula

Regular Solids: VCIR 121-136, formulas for surface area and volume PSAUS 149, Regular Solids - formulas for volumes

Research Lab: THE RESEARCH LAB (With answers to a very wide variety of odd maths questions!)

Rhombus: PSAUS 135

Right angle: MM1 72

Right angled triangles: MM2 81-88

Roman numerals: MM1 27-31

Rounding off: ESSAR 145-152, MM1 126-129

RSA codes: CODES 145-157


Sam Loyd: The Sam Loyd Sliding Block Puzzle, Sam Loyd's Get Off The Earth Puzzle

Sampling: LUCKY 149-152

Scale: FANG 20-29

Sector: PSAUS 156

Segment: PSAUS 157

Semicircle: right angle VCIR 12-13,

Semiperimeter: PSAUS 116

Set Square: FANG 17-18

Shadow Stick: DMEAS 66

Significant digits/figures: ESSAR 145

Simulaneous Equations: graph solving PHX 136-137, elimination and substitution PHX 147-156

Sin: FANG 60-66, 60º, 0º, 90º, 45º FANG 88-92, getting values by drawing FANG 94-96, sin formula PSAUS 120, sin formula FANG 114-118, triangle area formula FANG 128-130

Sine wave: FANG 165-174, The sounds of SIN and SQUARE waves

Sohcahtoa: FANG 71

SPEED: PSAUS 38-60, MM2 61-73

Sphere: PSAUS 10, 170-172

SQUARE (shape): how to draw with ruler and compasses VCIR 74-76, how to fold VCIR 94

SQUARE (x2): NUM 43-56

Square Pyramid Numbers: NUM 63-64, PSAUS 20

Square Roots: How to work out Square Roots without a calculator, square root of i The Research Lab

Stamps: formula for number of ways of tearing from a sheet PSAUS 21-24, 196-197, Matthew Sheeran's Amazing Stamps Formula!

Standard Form: DMEAS 56-63, MM1 130-135

Star: distance away FANG 147-158

Subtraction: ESSAR 53-70

Sudoku: how many possible grids? SUD 122-127

Symmetry: MM1 136-141


Tan: FANG 69-71, 45º FANG 94

Tangents: VCIR 114

Temperature: DMEAS 169

Tessalation: VCIR 88-91, MM1 19-21

Testing for factors: MANDV, NUM 108-111, Testing if numbers divide by 11, 7 or 13, The 11 Test

Tetrahedral Numbers: NUM 62-63, PSAUS 19, 90

Tetrahedron: PSAUS 148-149, VCIR 121, 125, 127, 131, 133

Thales: VCIR 12-13,

Think of a number tricks: PHX 79

Time: DMEAS 158-167, see Speed, Acceleration, Pendulums

Times tables: ESSAR 71-92

Topology: bridge crossing and drawing problems MM2 136-145

Torus: PSAUS 173-174, volume The Research Lab

Trancindental numbers: NUM 174-183

Trapezium: PSAUS 139-142, Calculating the Area of a Trapezium without the height!

TRIANGLES: VCIR 39-65, formulasPSAUS 126-134 constructing FANG 38-45, sin area formula FANG 128-130

Triangle Numbers: MM2 123-130, NUM 54-56, PSAUS 17-18, 21, 89, The link between Squared Triangle and Cube Numbers, NUM 64-65

Triangulation: FANG 133-136

Tricks: DBB, PHX 74-90, Professor Fiendish's Tricks and Games

Trigonometry: FANG (whole book), PSAUS 121


Unit fractions: PSAUS 192

Units of measurement: DMEAS 168-174, Some Unusual Units


Volume: measuring DMEAS 127-133


Waves: sin cos tan FANG 165-180


Y intercept (on graphs): PHX 135


Zero: invention of 0 MM1 35-36, impossible proof PHX 157




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