I like your tutorial! very clear and concise. Good job!

Thank you for posting the very helpful tutorial. I think that data sufficiency questions can be a bit challenging initally since the question format is unique and not familiar to most people.

I also found a host of data sufficiency gmat practice questions (see link) that might be good for practice. I also found some at About.com (althuogh I cannot recall the exact location since my computer crashed, but the ones on About.com are excellent too).

Thanks prepfortests for posting.

Pretty good tutorial dude. It was a very good place to start data Sufficiency. I feel a lot more confident and comfortable with DS now. Thanks a ton!

dang i scored an 18/20 in this. I made two silly mistakes..
The first one was seriously my bad. I mean since we do not encounter the term cuboid many times I was always under the assumption that a cube has uneven lengths for its sides and a regular cube has all equal sides.
The second one was due to me being lazy.