Mathematics

What algorithms can be used to find the two prime factors of a semiprime, and how can they be implemented? (Grade A)

To what extent can counting cards using the HiLo counting system benefit the gambler in comparison to a standard Blackjack strategy? (Grade B)

How reliable is Fourier Analysis in the analysis of signal processing? (Grade B)

What would be the best method to approximate π without a calculator? (Grade B)