Our IQ level can be factored into our 'fluid intelligence' (problem solving and learning ability in novel situations) and 'crystallized intelligence' (experience based expertise and knowledge). Fluid intelligence is based more on our biology; crystallized intelligence more on our culture. Crystallized intelligence can be thought of as what we invest our fluid intelligence into. Th free brain training software on this site has been shown in scientific studies to increase fluid intelligence substantially - but 40% in 20 daily sessions in fact. It also increases working memory capacity - something closely related to fluid intelligence. You can learn about it on this site put up by a cognitive neuroscientist (me!). It's free.

Here it is: http://www.iqlift.com