thanks it makes sense.
try another two from the powerprep
http://img4.imageshack.us/img4/5969/330200945703pm.png
http://img7.imageshack.us/img7/5198/graphrp3.png
my exam is tomorrow. post the solution as early as possible.
FOR DI the ans is 7
For speed problem, i think your formula should be applied when a vehicle goes a certain distance and then returns in the same direction.
but however, your ans for the speed problem is correct.
Two shelf T and S are given. If 3 books from S shelf are replaced to T shelf then the number of books become equal. If 7 books from T are replaced to S shelf then 3 times books in T is equal to S. What are the total number of books?
A talent contest has 8 contestants. Judges must award prizes for 1st, Second and third places . If there are no ties a) How many different ways can the prizes be awarded, and b) how many different groups of 3 people can get prizes?
in actual test it is most likely that they will give you the clue where the correct answer is? Like,say, in paragraph 5 what ............the author mean?
Hope this help.