About Shelby Joe

Shelby Joe 周 is the Founder of Piqosity. He has more than 20 years of experience in education as an entrepreneur, professor, and tutor. Shelby earned his BA in Political Science from Rice University. Born and raised in Mississippi, he now resides in Houston but has also lived in Beijing, Shanghai, and Hamburg.

ISEE Math Review – Percentages

A percent is a mathematical relationship between two quantities where one quantity is a particular portion of the other quantity. This relationship is always defined within the context of a certain number of parts out of 100 parts, where the first number is the percentage. You can determine what percent a quantity is of [...]

By |2021-09-28T13:23:40-05:00May 2nd, 2017|ISEE: Upper Level Math Review|

ISEE Math Review – Powers and Roots

Powers or exponents refer to multiplying the same number to itself a certain number of times, and the same is true for variables and algebraic expressions. The exponent will be located in the upper right hand corner next to the number and will be much smaller than the number (called superscript). When the power [...]

By |2021-09-28T13:24:08-05:00May 2nd, 2017|ISEE: Upper Level Math Review|

ISEE Math Review – Number Lines

Number lines are used to visually represent the relationships between integers, fractions, and decimals and to show how mathematic operations work in these relationships. Some number lines are shown with arrows pointing in opposite directions on either end of the line to designate a continuity of sequence in positive and negative numbers. The number line [...]

By |2021-09-28T13:24:21-05:00May 2nd, 2017|ISEE: Upper Level Math Review|

ISEE Math Review – Order of Operations

Operations are the actions taken to solve math problems: addition, subtraction, multiplication, division, grouping (placing values in parentheses), and exponentiation (multiplying the same number to itself a certain number of times). Order of Operations was developed to make sure operations in a problem are completed in a particular order to achieve the correct result. [...]

By |2021-09-28T13:24:33-05:00May 2nd, 2017|ISEE: Upper Level Math Review|

ISEE Math Review – Mathematic Properties

Math is filled with theorems, axioms, and properties. Though the following properties may seem simplistic, the ISEE will couple these properties with difficult concepts, such as algebraic functions. Reflexive Property A value is equal to itself. x = x Examples 17 = 17 y = 400 Symmetric Property Equal values may be placed on [...]

By |2021-09-28T13:24:39-05:00May 2nd, 2017|ISEE: Upper Level Math Review|

ISEE Upper Level Official Practice Test Answer Explanations

The ISEE Upper Level is the private schools admissions test for students applying to grades 9 through 12. It is administered by the non-profit group, Educational Records Bureau, ERB, which is also the same group behind other popular private school tests like the CTP-4 often generically called "ERBs." An acronym for Independent School Entrance Exam, [...]

By |2021-09-28T13:27:35-05:00April 18th, 2017|ISEE: Upper Level|
Go to Top