Math Flashcards
(102 cards)
1/6
0.166
1/8
0.125
Principal + I nterest
Principal * (1 + r)^t
Percent Change
(Difference / Original) * 100
Dividend
Number that is being divided
Divisor
Number dividing by
Greatest Common Factor (GCF)
The largest divisor of 2 or more integers
Least Common Multiple (LCM)
The smallest multiple of 2 or more integers
Prime
An integer that is only divisible by 1 and itself
A number is divisible by 2
Its even (i.e., its last digit is even)
A number is divisible by 3
Its digits add up to a multiple of 3
A number is divisible by 4
Its last two digits are divisible by 4
A number is divisible by 5
Its last digit is 5 or 0
A number is divisible by 6
Apply the rules of 2 and 3
A number is divisible by 9
Its digits add up to a multiple of 9
A number is divisible by 10
Its last digit is zero
A number is divisible by 12
Apply rules of 3 and 4
Positive integers that are perfect squares have…
An odd number of factors
Positive integers that are not perfect squares have…
An even number of factors
GCF(x, y)
GCF(x - y, y)
LCM(a, b)
ab / GCF(a, b)
Finding the Number of Factors
- Write the prime factorization of the intege in exponent form.
- Add 1 to each exponent.
- Multiply the resulting sums together.
Rational Number
A number that can be expressed as a simple fraction.
Irrational number
A number that cannot be expressed as a fraction.
