Murderous Maths facts for kids

Quick facts for kids
Murderous Maths

The Guaranteed to Bend Your Brain cover
Author	Kjartan Poskitt
Illustrator	Philip Reeve; Ian Baker; Rob Davis; Daniel Postgate
Country	United Kingdom
Language	English
Subject	Mathematics
Genre	Children's; mathematics
Publisher	Scholastic
Publication date	1997 – present

Murderous Maths is a series of British educational books by author Kjartan Poskitt. Most of the books in the series are illustrated by illustrator and author Philip Reeve, with the exception of "The Secret Life of Codes", which is illustrated by Ian Baker, "The Essential Arithmetricks: How to plus, minus, times and divide." illustrated by Daniel Postgate and Rob Davis, and "The Murderous Maths of Everything", also illustrated by Rob Davis.

The Murderous Maths books have been published in over 25 countries. The books, which are aimed at children aged 8 and above, teach maths, spanning from basic arithmetic to relatively complex concepts such as the quadratic formula and trigonometry. The books are written in an informal similar style to the Horrible Histories, Horrible Science and Horrible Geography series, involving evil geniuses, gangsters, and a generally comedic tone.

Titles

The following are the thirteen books that are available in the series.

• Guaranteed to Bend Your Brain (previously Murderous Maths), ISBN: 0-439-01156-6 - (addition, subtraction, multiplication, division, percentages, powers, tessellation, Roman numerals, the development of the "10" and the place system, shortcomings of calculators, prime numbers, time - how the year and day got divided, digital/analogue clocks, angles, introduction to real Mathematicians, magic squares, mental arithmetic, card trick with algebra explanation, rounding and symmetry.)
• Guaranteed to Mash your Mind (previously More Murderous Maths), ISBN: 0-439-01153-1 (the monomino, domino, tromino, tetromino, pentomino, hexomino and heptomino, length area and volume, dimensions, measuring areas and volumes, basic rectangle and triangle formulas, speed, conversion of units, Möbius strip, Pythagoras, right-angled triangles, irrational numbers, pi, area and perimeter, bisecting angles, triangular numbers, topology networks, magic squares.)
• Awesome Arithmetricks (previously The Essential Arithmetricks: How to + - × ÷), ISBN: 0-439-01157-4 - (counting, odd even and negative numbers, signs of maths, place value and rounding off, manipulating equations, + - x ÷ %, long division, times tables, estimation, decimal signs, QED.)
• The Mean & Vulgar Bits (previously The Mean & Vulgar Bits: Fractions and Averages), ISBN: 0-439-01270-8 (fractions, converting improper and mixed fractions, adding subtracting multiplying and dividing fractions, primes and prime factors, reducing fractions, highest common factor and lowest common denominators, Egyptian fractions, comparing fractions, cancelling out fractions, converting fractions to decimals, decimal place system, percentages: increase and decrease, averages: mean mode and median.)
• Desperate Measures (previously Desperate Measures: Length, Area and Volume), ISBN: 0-439-01370-4 (measuring lines: units and accuracy, old measuring systems, the development of metric, the SI system and powers of ten, shapes, measuring areas and area formulas, weight, angles, measuring volume, Archimedes Principle, density, time and how the modern calendar developed.)
• Do You Feel Lucky? (previously Do You Feel Lucky: The Secrets of Probability), ISBN: 0-439-99607-4 (chance, tree diagrams, mutually exclusive and independent chances, Pascal's Triangle, permutations and combinations, sampling.)
• Savage Shapes (previously Vicious Circles and Other Savage Shapes), ISBN: 0-439-99747-X (signs in geometric diagrams, Loci, constructions: perpendicular bisectors; dropping perpendiculars; bisecting angles, triangles: similar; congruent; equal areas, polygons: regular; irregular; angle sizes and construction, tessellations and Penrose Tiles, origami, circles: chord; tangent; angle theorems, regular solids, Euler's formula, ellipses, Geometric proof of Pythagoras' Theorem.)
• The Key To The Universe (previously Numbers: The Key To The Universe), ISBN: 0-439-98116-6 (phi, Fibonacci Series, Golden Ratio, properties of Square, Triangle, Cube, Centred Hexagon and Tetrahedral numbers, "difference of two squares", number superstitions, prime numbers, Mersenne primes, tests to see if a number will divide by anything from 2-13 and 19, finger multiplication, binary, octal, and hexadecimal, perfect numbers, tricks of the nine times table, irrational transcendental and imaginary numbers, infinity.)
• The Phantom X (previously The Phantom X: Algebra), ISBN: 0-439-97729-0 (variables, elementary algebra, brackets, factorising, expanding, and simplifying expressions, solving quadratics and the quadratic formula, "Think of a number" tricks, difference of two squares, coefficients of (a-b)n, linear graphs: co-ordinates; gradients; y intercept, non-linear function graphs including parabolas, simultaneous equations: substitution and elimination, dividing by zero!.)
• The Fiendish Angletron (previously The Fiendish Angletron: Trigonometry), ISBN: 0-439-96859-3 (scales and ratios in maps and diagrams, protractor and compass, SIN, COS and TAN ratios in right angled triangles, trig on a calculator; normal and inverse, sine and cosine formulas for non-right-angled triangles, triangulation, parallax angles and parsecs, sin/cos/tan relationships, sin wave, bearings.)
• The Perfect Sausages (previously The Perfect Sausage and other Fundamental Formulas), ISBN: 0-439-95901-2 (areas and volumes, ellipsoids and toruses, number formulas (e.g. triangle, hexagonal), speed, acceleration, stopping time, distance, force, gravity, projectiles, Money: percentages; simple and compound interest, permutations and combinations.)
• The 5ecret L1fe of Code5 (previously Codes: How to Make Them and Break Them), ISBN: 978-1-4071-0715-8 (patterns, logic and deduction, prime numbers, high powers, modular arithmetic.)
• Easy Questions, Evil Answers, ISBN: 1-407-11451-4 (formulas, working out square roots by hand, π, Pythagoras, paradoxes, problem solving, metric prefixes, large numbers, vectors.)

Related puzzle books have been published also:

• Professor Fiendish's Book of Diabolical Brain-benders, ISBN: 0-439-98226-X (mazes, logic, coin problems, number crosswords, shape cutting/rearranging, number squares.)
• Professor Fiendish's Book of Brain-benders (a smaller version of the above) (same as above)
• Sudoku: 100 Fun Number Puzzles, ISBN: 0-439-84570-X
• Kakuro and Other Fiendish Number Puzzles, ISBN: 0-439-95164-X

One title that covers many different areas of mathematics has also been released:

• The Most Epic Book of Maths Ever (previously The Murderous Maths of Everything), ISBN: 1-407-10367-9 (prime numbers, Sieve of Eratosthenes, Pythagoras' Theorem, triangular numbers, square numbers, the International Date Line, geometry, geometric constructions, topology, Möbius strips, curves (conic sections and cycloids Golomb Rulers, four-dimensional "Tic Tac Toe", The Golden Ratio, Fibonacci sequence, Logarithmic spirals, musical ratios, Theorems (including Ham sandwich theorem and Fixed point theorem), probability (cards, dice, cluedo etc.), Pascal's Triangle, Sierpinski Triangle, chess board, light years, size and distance of moon and planets, orbit, size of stars, shape of galaxy.)

Kjartan has also written a book entitled Everyday Maths for Grown-Ups (2011).

Recurring characters

There are a number of recurring characters in the MM books. These include:

• Colonel Cancel and his Valiant Vector Warriors
• Thag the Mathemagician
• Urgum the Axeman, Grizelda the Grisly, Hunjah the Headless and Mungoid the Jungoid
• Professor Fiendish and his pet pig, Truffles
• The Fogsworth family, including the Duchess, the Colonel, Auntie Crystal, Rodney Bounder, Primrose Poppet, Binky Smallbrains, Lord Binkiebott Marmalade Fogsworth and Croak the Butler
• Pongo McWhiffy, disgusting hamburger seller, and Veronica Gumfloss, his spiteful crush
• Riverboat Lil and Brett Shuffler, two 19th-century riverboat gamblers
• Sheerluck Homes (parody of Sherlock Holmes)
• The Boccellis (Blade, Paul 'Porky' and 'One Finger' Jimmy), the Gabriannis ('Weasel', 'Chainsaw' Charlie, 'Numbers' and 'Half-Smile') and Dolly Snowlips
• The Evil Gollarks (from the planet Zog)
• Kumar in his curry restaurant, The Ravenous Rajah
• The Pure Mathematicians (Janet, Matt Kimpton and Tom Winch, plus a final, unnamed character. These are named after a real-world teacher and a pair of real-world pure mathematicians respectively.)
• Luigi, in his restaurant (called Luigi's Diner), with Benni - the only place the gangsters go: they are the only customers for obvious reasons.

Spin-offs

• Killer Puzzles (Written by Kjartan Poskitt)
• The Urgum The Axeman series (by Kjartan Poskitt and illustrated by Philip Reeve)