Solving Math Riddles is a fun way to practice basic arithmetic skills. The questions range from simple addition and subtraction problems to more complex ones such as solving equations, calculating the ...

Provides a one-semester course in probability and statistics with applications in the engineering sciences. Probability of events, discrete and continuous random variables cumulative distribution, ...

Here's a question about death and probability, done first by Cory Doctorow. Suppose one out of every million people is a terrorist (if anything, an overestimate), and you've got a machine that can ...