innumeracy means lack of numeracy; low numeracy. Lexicurio rates it Sui generis — a strength score of 89 out of 100.
Why “innumeracy” is a great word
INNUMERACY — [Noun] A deficiency in basic mathematical skills and the ability to reason effectively with numbers, probabilities, and quantitative logic. From the English prefix in- (meaning "not") + numeracy (meaning "mathematical competence"), coined by Douglas Hofstadter and popularized by mathematician John Allen Paulos in his 1989 book 'Innumeracy: Mathematical Illiteracy and its Consequences.' Unlike "illiteracy" (which denotes an inability to read and write) or "innumerate" (which is its adjectival form), innumeracy is the specific condition of quantitative blindness. It is misjudging risk by orders of magnitude, trusting a personal anecdote over a statistical trend, and believing a coin is "due" for heads after a run of tails—a quiet surrender to a world whose hidden grammar we have agreed not to understand.
Etymology
From in- + numeracy; coined by Douglas Hofstadter and popularized by mathematician John Allen Paulos in his 1989 book Innumeracy: Mathematical Illiteracy and its Consequences.
noun
- Lack of numeracy; low numeracy.“John Allen Paulos and others have asked our society to consider numeracy and innumeracy in a way closer to how we view literacy and illiteracy.”