Prime Factorisation worksheets
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Q. 2 x 2 x 2 or 23 is the prime factorization of
answer choices
6
12
22
8
Q. What number is never allowed in a factor tree?
answer choices
13 (it's bad luck!)
1
8675309
2
Q. Which is the prime factorization of 12?
answer choices
2 x 6
2 + 2 + 2 + 2 + 2 + 2
22 x 3
1 x 22 x 3
Q. Using a Factor Tree, find the prime factorization of 75.
answer choices
52 x 3
5 x 5 x 3
32 x 5
15 x 5
Q. Use a number tree to find the prime factorization of 48
answer choices
4x2x6
4x22x3
3x24
12x4
Q. If the expanded form is 2⋅2⋅2⋅3⋅3⋅5⋅7 what would the exponential form be?
answer choices
2⋅3⋅5⋅7
2³⋅3²⋅5⋅7
2²⋅3²⋅5⋅7
8⋅9⋅35
Q. Create a factor tree and find the prime factorization for 80
answer choices
24⋅5
42⋅5
2⋅2⋅2
8⋅5⋅2
Q. Which of the following are all prime numbers
answer choices
2, 3, 6, 7, 9
2, 4, 8, 16
2, 3, 5, 7, 9
2, 3, 5, 7, 11
Q. Only 1 answer below could be correct for the prime factorization of a number. Which answer could be correct.
answer choices
4⋅2⋅5
2⋅32⋅7
152⋅7
7²⋅4²
Q. In a power, an _______ is the the number that tells how many times the base is used as a factor.
answer choices
exponent
base
composite number
prime number
Q. 3 x 3 x 3 x 3
is an example of
is an example of
answer choices
exponential notation
expanded notation
base
exponent
Q. Any base to the power of 1 equals...
answer choices
-1
the base
0
1
Q. Any base to the power of zero equals...
answer choices
-1
the base
0
1
Q. Write 144 in prime factorization. You can use the ladder or factor tree. Show your work.
answer choices
22 x 34
24 x 32
23 x 33
24 x 33
Q. Write 76 in prime factorization. You can use the ladder or factor tree. Show your work.
answer choices
22 x 19
2 x 192
2 x 19
22 x 192
Q. Write 384 in prime factorization. You can use the ladder or factor tree. Show your work.
answer choices
24 x 3
26 x 3
27 x 3
25 x 3
Q. Which of these is NOT a factor of 36?
answer choices
2
8
12
6
Q. One is
answer choices
prime
composite
not prime or composite
the loneliest number that you'll ever do
Q. A composite number
answer choices
has more than 2 factors
has one factor
has at least 10 factors
is always a really big number
Q. Which is a factor of 15?
answer choices
2
3
4
6
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