1. Innumeracy Innumeracy
Innumeracy was defined as the condition of having difficulties with figures, statistics, and visualizing distances. Innumerate people have trouble performing mental arithmetic, if they can even perform mental calculations at all. However, just as illiteracy can be the result of dyslexia, innumeracy can be the result of a phenomenon called dyscalculia.

2. You just can't make this stuff up

3. Research
  For example, one survey showed that, given a choice of £30 or 10% of £350, one-fifth of those surveyed chose the £30. The FSA chairman went on to explain that people who use financial products and services very often do not have the level of numeracy needed to truly understand those products and services. JF

5. Dyscalculia
 Although dyscalculia causes innumeracy, innumeracy is not always the result of dyscalculia. Innumeracy can be the result of poor education or poor application of oneself to mathematical subjects.

8. Average?
Lake Woebegone: Where all the women are strong; all the men are good-looking and all the children are above average. Garrison Keillor.