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# Archive | Counting

## Challenging GMAT Math Practice Questions

Here are fifteen challenging questions for GMAT math practice with explanations. Can you keep the GMAT Quant pace, doing these in under 90 seconds each?

## GMAT Tuesdays – Probability and Counting

Today we learn more about probability and counting. Probability questions involving counting are really just multi-step counting problems. Watch the video to learn more. And if you want even more practice, click here: GMAT Probability and Counting Techniques This week’s board:

## Counting Practice Problems for the GMAT

1) A librarian has 4 identical copies of Hamlet, 3 identical copies of Macbeth, 2 identical copies of Romeo and Juliet, and one copy of Midsummer’s Night Dream. In how many distinct arrangements can these ten books be put in order on a shelf? (A) 720 (B) 1,512 (C) 2,520 (D) 6,400 (E) 12,600   […]

## Difficult GMAT Counting Problems

Here are a few 800+ counting problems.  Yes, that’s right, 800+, which means, as hard as (or possibly harder than) anything you will see on the GMAT.  If you can do these, you are in great shape! 1) How many four digit numbers have no repeat digits, do not contain zero, and have a sum […]