Using a Rule to Find Decimal Products Answers
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Lina and Josh each made a factor tree to find the prime factorization of 126. Lina’s Solution Josh’s Solution Which statement explains the accuracy of the students’ work?
A
Lina’s solution is correct because it expresses 126 as a product of prime factors.B
Josh’s solution is correct because the factor tree of every even number must begin with 2 and its factor pair.C
Both solutions are correct because they both express 126 as a product of factors.D
Neither solution is correct because the factor tree should have begun with 6 and 21.2
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Which number is a factor of 100?
A
8B
12C
15D
203
What is the prime factorization of 40?
A
2 times 5
B
2 times 20
C
2 times 2 times 2 times 5
D
2 times 2 times 4 times 5
4
The prime factorization of a number is . Which statement is true about the factors of the number?
A
Twenty-one is a factor of the number because both 3 and 7 are prime factors.B
Twenty-one is not a factor of the number because 21 is not prime.C
Ninety is a factor of the number because and 90 is divisible by 9.
D
Ninety is not a factor of the number because 90 is not divisible by 7.5
What is the sum of the first four composite numbers?
A
19B
20C
27D
286
Which list shows all the factors of 18?
A
1, 2, 3, 4, 6, 9, 18B
1, 2, 3, 6, 9, 18C
2, 3, 4, 6, 9D
2, 3, 6, 97
Which number is a factor of 51?
A
7B
11C
17D
268
What is the sum of the first five prime numbers?
A
18B
26C
28D
399
Rathan thinks all factors of even numbers are even. Is Rathan correct or incorrect?
A
He is correct because the product of 2 and any number is odd.B
He is correct because the product of two even numbers is even.C
He is incorrect because the product of an even number and an odd number is even.D
He is incorrect because the product of two odd numbers is odd.10
Which is a true statement about the number 1?
A
One is a factor of every whole number since every number is divisible by itself.B
One is not a factor of any number because it is neither a prime number nor a composite number.C
One is a prime number because it has less than two factors.D
One is a composite number because it has more than two factors.Did you find these answers helpful?
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