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Translation words & key concepts to know 'cold' for the sat math section

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integer

numbers without fractional or decimal parts (positive, negative and/or zero)

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positive numbers

any number greater than zero (don't forget fractions!)

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negative numbers

any number less than zero

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prime numbers

a number which can only be divided by itself and 1

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Of 0, 1 & 2, which are prime?

2

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consecutive

numbers that follow one after the other in a sequence (1, 2, 3...)

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percent

divide by 100 ( /100)

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mean

average (add up the numbers, divide by the number of numbers

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median

the middle of a set of numbers

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mode

the most frequent occuring number in a set of numbers

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What is significant about 3-4-5

Is a "special right" triangle

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number of degrees in a triangle

180

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number of degrees in a circle

360

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difference means

subtract

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pythagorean theorem

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If a triangle has two SIDEs that are equal it also has two

angles that are equal

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An equilateral triangle has

three equal sides and three equal angles

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Each angle of an equilateral triangle = x degrees

60

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A number is divisible by two if...

it is even

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A number is divisible by nine if....

the sum of its digits is divisible by nine

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A number is divisible by three if....

the sum of its digits is divisible by three

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A number is divisible by five if....

it ends in 0 or 5

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A number is divisible by ten if

it ends in 0

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To divide a number by 10

move the decimal place to the left by one

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To multiply a number by 10

move the decimal place to the right by one

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To get 10% of a number

divide the number by 10 (some people remember this as move the decimal place one to the left)

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100% of a number

is the number

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The square root of a number squared

is the number (sqr root of 3^^2 (or 9) is 3)

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If we multiply an equation with greater than or less than by a negative number

the sign flips

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a triangle as contains angles summing to ____degrees

180 degrees