Free Practice Question
PS · Problem Solving
sub-505
Divisibility/Multiples/Factors
What is the count of prime numbers between 1 and 100 that are factors of 210?
Answer Choices
Correct answer marked belowA
One
B
Two
C
Three
Four
Correct
E
Five
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Explanation
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Official Explanation
Official
To determine how many prime numbers between 1 and 100 are factors of 210, we perform prime factorization. The factorization of…
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Comments
4
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J
JohnApr 11, 2025
Great explanation
A
ArshvirFeb 6, 2025
thanks for the answer
D
DivyanshMay 19
wait I only counted 3 at first because I forgot 7 😅
G
GowthamMay 21
lol same, 7 sneaks up on you every time
A
AdyaMay 30
yeah i always miss one of the bigger ones
A
AshishMay 21
Is 2 supposed to count? I wasn't sure if they wanted only odd primes or something.
K
KaydenMay 28
2 is prime so yes it counts
What this question tests
What it tests
Your understanding of divisibility rules, least common multiples, and greatest common factors.
Common trap
Forgetting that 1 is not prime and that every integer divides 0.
Details
Difficulty
sub-505
Type
PS
Category