Math Definitions
10 Second Mental Math
Factoring
Divisibility Rules
Multiples of 10
100
One of two numbers that, when multiplied together, form a product.
What is a factor?
100
7 X 12 =
What is 84?
100
1,2,3,4,6,8,12,24
What are the factors of 24?
100
The sum of my digits leave no remainder when divided by this second prime number.
What is 3?
100
10 x 90 =
What is 900?
200
Two numbers, that when multiplied together, form a product.
What is a factor pair?
200
12 X 12 =
What is 144?
200
1,2,4,5,10,20,25,50,100
What are the factors of 100?
200
If 2 and 3, then you know I am divisible by ________.
What is 6.
200
20 X 90 =
What is 1800?
300
A number with more than one factor pair.
What is a composite number?
300
13 X 13 =
What is 169?
300
1,2,3,4,6,12,36
What factor is missing?
300
You find me as a factor of 121 when 3 and 4 are in the "T" table.
What is 12?
300
21 X 90 =
What is 1890?
400
A number with only one factor pair.
What is a prime number?
400
14 X 14 =
What is 196?
400
25 X ______ = 700
What is 28?
400
Without me you can't identify that I am prime.
What is "1"?
400
25 X 90 =
What is 2250?
500
A number that is the product of two identical factors.
What is a square number?
500
27 X 25 =
What is 675?
500
I am the product of two primes, less than 60, and greater than 50. My digits are odd.
What is 51?
500
You need to know my last three digits if you want to know that I am divisible by this number.
What is 8?
500
31 X 3000 =
What is 93,000?
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