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Divisibility Rules
Rounding Numbers
Prime or Composite
Vocabulary
Factor Strings
100
This number is between 60 and 70 and is divisible by 5.
What is 65?
100
Round to the nearest tens: 567
What is 570?
100
Is 33 prime or composite?
What is composite?
100
When a person unsquares a number, that are finding the number's ______________.
What is square root?
100
2 x 2 x 2 x 3 is the factor string for this number.
What is 24?
200
735 is divisible by which of these numbers: 2,3,6,9,5,10,4
What is 3 & 5?
200
Round 4,245, 930 to the nearest thousand.
What is 4,246,000?
200
A number that is divisible by only itself and 1.
What is a prime number?
200
The longest factor string of a number.
What is prime factorization?
200
All of the numbers in a prime factorization string.
What are prime numbers?
300
The number in this list is NOT divisible by 6: 384 5,454 7,960 1,800
What is 7,960?
300
Round 989.989 to the nearest hundred.
What is 1,000?
300
The number that is neither prime nor composite.
What is 1?
300
A factor pair for 15.
What is 1 and 15 or 3 and 5?
300
There are no factor strings for this type of number.
What are prime numbers?
400
A number is divisible by _____ if the last two numbers are divisible by it.
What is 4?
400
Round 2,059.876 to the nearest hundreds.
What is 2,100.00?
400
The number in this list that is composite: 2 3 5 7 11 13 17 19 21 23 29 31 37
What is 21?
400
A number times itself.
What is a square number?
400
A factor tree is used to figure this out.
What is prime factorization of a number?
500
This 3-digit number between 770 and 780 is divisible by 2,3,6,and 9.
What is 774?
500
Round 789,789.789 to the nearest hundredth.
What is 789,789.790?
500
This states that every even number greater than 2 can be written as the sum of two prime numbers.
What is Goldbach's conjecture?
500
3 x 4 = 4 x 3 is an example of this property.
What is the commutative property of multiplication?
500
This number is not used in a factor string.
What is 1?