No it isn't racist, but many of the people who have 'asked the question' have been. The problem with the question is that it seeks to correlate two concepts which are not well understood, or are, at best, questionable.
Intelligence is notoriously difficult to define, let alone measure. Standard IQ tests claim to do so, but they are always (if reputable) 'norm referenced' - that means that the actual scores are arranged in a distribution around a centre value of 100, so that 100 is always 'average' IQ,
Some 'absolute' IQ tests of different races HAVE been conducted and tend to indicate that Asians around the China region score highest, 'westerners' somewhere in the middle, and sub-Saharan Africans at the bottom. The problems with this are:
a) The tests used almost certainly test for things other than 'intelligence'. Imagine a genius who didn't know how to read or write. It is unlikely they would score very highly on most IQ tests because they would not understand the questions or how to answer them.
b ) The concept of 'race' is difficult to define with any degree of precision, and it is arguably a fairly useless way of categorising humans. When does an 'African' become a European? Is the child of Brazilian woman and English man South-american? European? Braziliian? English?
The question is largely meaningless because we are all a product of genes from many areas of the world - and ultimately we all share an African ancestor if we go back far enough (only a few tens of thousands of years),
So, whilst I think that it is fair enough to ask the question, I would be deeply suspicious of any answer one received and would examine it carefully to see how it defined 'race' and how it tried to avoid bias and secondary effects in measurements of 'intelligence'.
Edited by Bikerman, 16 March 2012 - 10:49 AM.