Maths with the laughs added in! \* Why nothing sometimes means something? \* Can you beat Professor Fiendish's foul formula? \* What can stop a hairy green spot epidemic? Find out in the Essential Arithmetricks - all the tricks, tips and short-cuts they don't teach at school.
This is Book 4 in the Murderous Maths Series. See all Murderous Maths books here.
See More Educational: Mathematics & numeracy
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Kjartan Poskitt is the well-loved author of many hilarious books for children including Agatha Parrot and the Murderous Maths series, translated into over 30 languages. With a background in children's television, he is a tireless and brilliant performer.
More about Kjartan PoskittBorn in Whitstable in 1964, Daniel is the son of the film-maker and author, Oliver Postgate. After school he worked as a chef in local restaurants and as an apprentice box-painter. In 1987 he went to London and worked as a freelance cartoonist for the Radio Times and Sunday Times. It was in 1994 that Daniel had his first book published, and this is now the b
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