Learn what an arithmetic sequence is and about number patterns in arithmetic sequences with this BBC Bitesize Maths KS3 article. For students aged of 11 and 14.

Do celebrities really die in three? Why the rule of three for celebrities is so tempting to believe in and what experts say.

Keep in mind that you don't have to borrow on margin to violate the pattern day trader rule. It's a good idea to be aware of the basics of margin trading and its rules and risks.