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MathRevolution
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MathRevolution
What is the prime factors’ number of 24?
A. 2
B. 3
C. 4
D. 5
E. 6

*An answer will be posted in 2 days.

Here we are asked to find prime factors but not the total number of factors.

First make prime factorization of an integer n = \(a^x\) * \(b^y\) * \(c^z\) where a , b and c and are prime factors of n and x,y and z are their powers.

Similarly factors of 24 = 3 * 2 * 2 * 2.

There are three 2s and one 3. So total there are 4 prime factors.

IMO C is the correct option.
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From 24=3(2^3), we get 2,2,2 and 3. Hence, the number of prime factors is 4.
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stonecold
Hi MathRevolution
What is the prime factors’ number of 24?

This statement is Not a GMAT like statement.
I have never heard this term "Prime factors number"

This question is as easy as they come.
Its the Ambiguous/Un-precise language that is a bit confusing and painful.

And just to add to the discussion -> I think this Question will further confuse students rather than clearing there concepts.

For On the GMAT ->
Number of prime factors ->Number of distinct prime factors.
Period.
Or else it would specially stated in the stem.
I hope it all of this makes sense :)


Regards
Stone Cold

Hi Stone Cold,

Mathematically, prime factors and different prime factors are different from each other.

Happy Studying!
Math Revolution Team
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MathRevolution
What is the prime factors’ number of 24?
A. 2
B. 3
C. 4
D. 5
E. 6

*An answer will be posted in 2 days.


I dont find this question makes any sense.. its just like using concept "'s" into "of number"... GMAT doesnt test your knowledge of english language in Math section.

its like forcefully someone has prepared this question....
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