As a footnote: I am new to the board, so have tried to be succinct. Happy to provide further detail or to answer questions. In case it's helpful to have more concrete information, the excerpt below from the psychologist's report makes me wonder why fluid reasoning did not have a higher score. It's probably worth noting that his math is primarily self-taught / learned by reading books on his own, and comes to him as naturally as breathing. Though I have a math background even I am often surprised by the math that he has mastered or intuitively understands.

"He was able to complete advanced problems including finding percentages, division and algebraic equations. He solved all the items on the Math Problem Solving test using mental math, including an item that required him to find the average of four numbers. He could order fractions in order, find perimeter, solve word problems, read graphs, find place value, measure objects and tell time. He solved a geometry problem that required him to rotate a triangle 90 degrees."

Much appreciation for any insights or advice.