I am searching for a book that can supply me with probability brain teasers, that can be solved using little arithmetic/mental math, paired with somewhat detailed solutions. Any suggestions?
Basically I am trying to work on my ability to solve simple probability problems and all the books I have been finding are intro to probability textbooks etc. What would be ideal is a "probability question of the day" book or even a website that supplies that. I want practice not a lesson book.
Thanks.
Example:
A cube painted with red paint was divided into 27 smaller cubes (3*3*3). Randomly pick one and toss it. What is the probability that at least one of the sides that can be seen has paint on it?