Apr 32 minSimultaneous Equations (GCSE/14+)Simultaneous equations are two (or more) equations, each with the same two (or more) unknowns and are "simultaneous" because they are solved together. The eq...

Apr 22 minAlgebraic Expansion and Factorization (GCSE/14+)Expanding single brackets To expand a bracket means to multiply each term of the brackets to the term outside of the brackets. For example in the expression ...

Mar 311 minSolution to the Birthday ProblemSolution: Using the fact that the probabilities of all possible outcome is always equal to 1 (i.e. 100% chance), P(at least 2 people share the same birthday)...