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Conjecture and Theorem

Conjecture and Theorem Conjecture can be best defined as a hypothesis about a mathematical rule. It is usually created after having witnessed a certain outcome in multiple specific cases. After countless trials are taken to see the validity of a conjecture, if it is proven to be true, it becomes a theorem. A theorem is … Read more

Writing Formulas for Arithmetic Sequences

An arithmetic sequence is a list of numbers that follow a definitive pattern. Each term in an arithmetic sequence is added or subtracted from the previous term. For example, in the sequence three is added to each previous term. This consistent value of change is referred to as the common difference. A sequence can be … Read more

ISEE Upper Level Practice Test

The Independent School Entrance Exam (ISEE) Upper Level is administered by the Educational Records Bureau for children applying to grades 9-12. Over 1,200 private middle schools and high schools use this exam to ensure new students are being admitted to a grade level that best fits their knowledge and abilities. Click “Start Test” above to … Read more

Degrees and Radians Overview

What are Angles? We use degrees as units of measurement for angles, and precisely determining how wide or narrow they are. The small circle symbol “°” is used following a number to denote that degrees are being represented. Note the following classifications: An acute angle is between 0-90° A right angle is 90° An obtuse … Read more