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Lines and Angles

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Intersecting Lines

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Mental math trick: Finding an adjacent square

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Mental math trick: Multiplying two digit numbers by eleven

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While a family was away on vacation, they paid...

0:00:56

(1/2 - 1/3)+(1/3 - 1/4)+(1/4 - 1/5)+(1/5 - 1/6) =

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The price of a coat in a certain store is $500. If the...

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In the figure above, what are the coordinates of point R?

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What is the difference between the sixth and fifth terms...

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From the consecutive integers -10 to 10, inclusive...

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A sequence of numbers a1, a2, a3, … is defined as...

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If n = (33)^43 + (43)^33, what is the units digit of n?

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During a trip, Francine traveled x percent of the total...

0:00:47

A certain restaurant that regularly advertises through the mail...

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Each week, a clothing salesperson receives a commission...

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During a trip that they took together, Carmen, Juan, Maria...

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The table shows a summary of the ticket sales from four...

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In the figure, the 6 small squares are identical, each with sides...

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Remainders

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Multiplication Rules for Even and Odd Numbers

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Addition & Subtraction Rules for Even & Odd Numbers

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General Properties of Even and Odd Numbers

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Least Common Multiple - Formula Method

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Least Common Multiple - Venn Diagram Method