- Sequences, Series and Patterns

What is the 20th term of the arithmetic sequence 13, 19, 25, 31, ...? The common difference is 19 – 13 = 6. Now that we know that, we can find the 20th term by 13 + 6(20 – 1). Thus, the 20th term is...

- Sequences, Series and Patterns

What is the 20th term of the arithmetic sequence 13, 19, 25, 31, ...? The common difference is 19 – 13 = 6. Now that we know that, we can find the 20th term by 13 + 6(20 – 1). Thus, the 20th term is...

- Algebraic Expressions and Equations
- Problem Solving (Misc.)
- Sequences, Series and Patterns

Final exams often accompany the final days of school. Sherry has had four tests so far in her science class, each worth 1/6 of her final grade. She scored 87%, 89%, 92% and 91% on these tests. Her...

- Percents and Fractions
- Plane Geometry
- Probability, Counting and Combinatorics
- Solid Geometry

Ariel, Ollie and Eden are going trick-or-treating for Halloween, but first their parents are taking them to a costume store to pick out costumes. The store has 9 different costume options available –...

- Number Theory
- Probability, Counting and Combinatorics
- Problem Solving (Misc.)
- Solid Geometry

The weekend has just begun, and Derek wants to build a snowman either on Saturday or Sunday, but he can only build a snowman if it snows. There is a 1/2 probability that it snows on Saturday, and a 1...

- Plane Geometry
- Probability, Counting and Combinatorics
- Problem Solving (Misc.)

March 14, or 3/14, is Pi Day because the first few digits of the number pi are 3.14! While the day celebrates the mathematical type of pi, it is a little more fun to celebrate the delicious pie that...