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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

ILTS Mathematics (208) Practice Test

The ILTS Mathematics exam is administered by the Illinois State Board of Education (ISBE) to assess the knowledge and skills of prospective math teachers in the state of Illinois. Click “Start Test” above to take a free ILTS Mathematics practice test, and check out our premium-quality ILTS test prep resources by clicking the links below! … Read more

Axis of Symmetry Overview

A line of symmetry refers to a line that is drawn through the center of a shape so that it creates two identical halves. Each half is a mirror image of the other. Some shapes have one line of symmetry, like an isosceles triangle, and other shapes have many lines of symmetry. For example, a … 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