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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