Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
42 Cards in this Set
- Front
- Back
If … then x is divisible by 3
|
The sum x’s digits is divisible by 3
|
|
If … then x is divisible by 3
|
The sum x’s digits is divisible by 3
|
|
If … then x is divisible by 4
|
The x’s last two digits divisible by 4
|
|
If … then x is divisible by 5
|
The last digit of x is 0 or 5
|
|
If … then x is divisible by 6
|
x is divisible by both 2 and 3
|
|
If … then x is divisible by 8
|
x is divisible by 2 three times
|
|
If … then x is divisible by 9
|
The sum of x’s digits is divisible by 9
|
|
The first 25 prime numbers are …
|
2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97
|
|
If a is a factor of b, and b is a factor of c, then … is a factor of c
|
a
|
|
Odd ± Odd = …
|
Even
|
|
Even ± Even = …
|
Even
|
|
Odd ± Even = …
|
Odd
|
|
Odd x Odd = …
|
Odd
|
|
Even x Even = …
|
Even
|
|
Even x Odd =…
|
Even
|
|
Using prime columns, find the GCF by taking the … count in each column
|
Smallest
|
|
Using prime columns, find the LCM by taking the … count in each column
|
Largest
|
|
Perfect squares must have a … number of total factors
|
Odd
|
|
The prime factorization of a perfect square contains only … powers of prime
|
Even
|
|
Dividend (x), Quotient (Q), Remainder (R), and Divisor(N) have … relationship
|
x/N=Q+R/N
|
|
You can … and subtract remainders directly as long as …
|
add or multiply
correct for excess and negative remainders |
|
In an evenly spaced set, the mean and median of the set are equal to the average of the … terms
|
First and Last
|
|
In an evenly spaced set, the sum of all the elements in the set is the … of the set multiplied by the …
|
Average of the set
Number of items in the set |
|
The number of consecutive multiples in a set is …
|
(Last – First) ÷ Increment + 1
|
|
The product of any set of n integers is divisible by …
|
n!
|
|
For any set of consecutive integers with … number of items, the sum of all the integers is always a multiple of the items
|
Odd
|
|
For any set of consecutive integers with an … number of items, the sum of all the items is never a multiple of all the items
|
Even
|
|
When multiplying exponents, combine the exponents by …
|
Adding
|
|
When dividing exponents, combine the exponents by …
|
Subtracting
|
|
When raising exponents to a power, combine the exponents by …
|
Multiplying
|
|
xa • xb = …
|
xa+b
|
|
ax • bx = …
|
(ab)x
|
|
xa/xb= …
|
x(a-b)
|
|
(a/b)x= …
|
ax/bx
|
|
(ax)y= …
|
axy
|
|
x-a = …
|
(1/x)a
|
|
(x+y)2= …
|
x2+2xy+y2
|
|
ax • by = …
|
ax • by
|
|
ax + ay = …
|
ax + ay
|
|
ax + ax = …
|
2a^x
|
|
a • ax = …
|
a^(1+x)
|
|
Even square roots have … value(s).
|
one
|