EntityQ1332573· pop 18· linked from 20 articlesVerbal arithmeticSign in to savea puzzle of reconstructing equations that have been enciphered into wordsConnectionsThe Strand MagazineEntityeducationEntitynumberEntityTorontoEntitywordEntitycomputer scienceEntityarithmeticEntityInternational Standard Book NumberEntityalgorithmEntityRichard FeynmanEntityletterEntityequationEntityadditionEntitymultiplicationEntitydivisionEntitydigital object identifierEntitydigitEntitysudokuEntityparityEntitypermutationEntityCategoriesLogic puzzlesNP-complete problems