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Common Square Roots
What are square roots and why do we care? The square root of a number is a number that, when multiplied by itself, equals the desired value. So, for example, the square root of 49 is 7 (7x7=49). The…Powers and Exponents
A power is the product of multiplying a number by itself. Usually, a power is represented with a base number and an exponent. The base number tells what number is being multiplied. The…Using Scientific Notation
Sometimes, especially when you are using a calculator, you may come up with a very long number. It might be a big number, like 2,890,000,000. Or it might be a small number, like 0.0000073…Polygons: How Many Sides?
A geometrical figure with three or more sides is called a polygon or a polyhedron. Here are the names for some polygons. 3 triangle, trigon 4 quadrilateral, tetragon 5 pentagon 6…Prefixes and Multiples
Prefix Symbol Equivalent Multiple/submultipleyoctoyseptillionth part10-24zeptozsextillionth part10-21atto a quintillionth part 10-18femto f quadrillionth part 10-15pico p trillionth part 10-…Decimal Equivalents of Common Fractions
1/2 .50001/3 .33331/4 .25001/5 .20001/6 .16671/7 .14291/8 .12501/9 .11111/10 .10001/11 .09091/12 .08331/16 .06251/32 .03131/64 .01562/3 .66672/5 .40002/7 .28572/9 .22222/11…Roman Numerals
Try our Roman Numeral Challenge. Roman numerals are expressed by letters of the alphabet and are rarely used today except for formality or variety. There are four basic principles for…Prime Numbers between 1 and 1,000
2 3 5 7 11 13 17 19 2329 31 37 41 43 47 53 59 61 6771 73 79 83 89 97 101 103 107 109113 127 131 137 139 149 151 157 163 167173 179 181 191 193 197 199 211 223 227229 233 239 241 251 257 263…Cardinal, Ordinal, and Nominal Numbers
Cardinal numbers, known as the “counting numbers,” indicate quantity. Ordinal numbers indicate the order or rank of things in a set (e.g., sixth in line; fourth place). Nominal numbers…Trending
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