see, basically b.arch is mostly about

3 dimensional perception & spatial visualization (includes visual sequencing - ie. seeing 3 figures and saying what comes next)

the other parts are some general knowledge stuff & easy maths.

now, for 3d perception, i advise you to take some free iq tests on the net (just type 'spatial intelligence iq tests' or something like that on google search & see how good u r in them). www.allthetests.com  & www.puzz.com is probably a gud site.

if u r naturally gud in them (as i am) no problems at all... u can rock this section without any preparation (only ur mental capability). Else, u may have to do more such questions to better increase ur level.

Also, u cud get some past years aieee solved b arch papers and see hoe ther are solved and also mug up the GK stuff (u never know, in aieee some questions do repeat)

hope this is useful to you...if so plz RATE