- General Math
- Sequences, Series and Patterns
- Algebraic Expressions and Equations
- General Math
Video by Art of Problem Solving's Richard Rusczyk.
- Probability, Counting and Combinatorics
Video by Art of Problem Solving's Richard Rusczyk.
- Algebraic Expressions and Equations
- General Math
- Problem Solving (Misc.)
Derrick received a total of 21 gift cards for graduation. He received gift cards in each of four denominations, $25, $50, $75 and $100. The number of $100 gift cards Derrick got was twice the number...
- Algebraic Expressions and Equations
- General Math
- Percents and Fractions
- Proportional Reasoning
As the weather is turning cooler and daylight is arriving later in the morning and trees are starting to lose their leaves, many of us are noticing that summer is over and we’re well into fall. Or is...