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What number am I? – Prime numbers and perfect squares

Math Teaser I am a perfect square. My square root is a prime number, less than 100, and the digits…

Probability – the OR case

We are continuing our discussion of Probability. If you missed the introduction and the "and" case of probability, here you…

Parallel and Perpendicular Lines Worksheet

A practice sheet for perpendicular and parallel lines! Practice the symbols and their names, identify line sets, and draw some…

Probability – the AND case

The concepts of probabilities are so useful in the understanding of everyday life. The concepts give insight into many areas…

Ohm’s Law – The principle of Electronic Circuits

There are many properties of electricity but some of the most basic are explained by Ohm’s Law. Ohm’s Law describes…

Reverse Calculation

Math Teaser! A number is divided by five. The result is divided by three, for a final result of two.…

Permutation and Combination and What is a Factorial?

If you have 7 different options on the menu and you can order 2 of them for your combo-meal, how…

Easy 2-digit subtraction tricks

Subtraction Tricks!    Quick subtraction of 2 digit numbers    Subtract both the ten's and one's place straight down.  If…

Basic Fractions, Improper Fractions, Mixed Numbers, Decimals, Percentage

Fractions are used to show partial amounts of whole numbers. If, for example, we have a value more than 1,…

Rectangle

Math Teaser! If a rectangle has an area of 192 square meters, and the length is three times longer than…