GMAT Question of the Day: Daily via email | Daily via Instagram New to GMAT Club? Watch this Video

 It is currently 20 Jan 2020, 14:21

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

The function f(x) represents the number of ways that prime numbers can

Author Message
TAGS:

Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 60515
The function f(x) represents the number of ways that prime numbers can  [#permalink]

Show Tags

04 Dec 2019, 01:01
00:00

Difficulty:

95% (hard)

Question Stats:

40% (03:05) correct 60% (03:01) wrong based on 39 sessions

HideShow timer Statistics

The function f(x) represents the number of ways that prime numbers can be uniquely summed to form a certain number x such that x = a + b + c + d… where those summed variables are each prime and a ≤ b ≤ c ≤ d ... For instance f(8) = 3 and the unique ways are 2 + 2 + 2 + 2 and 2 + 3 + 3 and 3 + 5. What is f(12)?

A. 4
B. 5
C. 6
D. 7
E. 8

Are You Up For the Challenge: 700 Level Questions

_________________
Senior Manager
Joined: 16 Feb 2015
Posts: 252
Location: United States
Concentration: Finance, Operations
The function f(x) represents the number of ways that prime numbers can  [#permalink]

Show Tags

Updated on: 04 Dec 2019, 02:03
2
Bunuel wrote:
The function f(x) represents the number of ways that prime numbers can be uniquely summed to form a certain number x such that x = a + b + c + d… where those summed variables are each prime and a ≤ b ≤ c ≤ d ... For instance f(8) = 3 and the unique ways are 2 + 2 + 2 + 2 and 2 + 3 + 3 and 3 + 5. What is f(12)?

A. 4
B. 5
C. 6
D. 7
E. 8

Are You Up For the Challenge: 700 Level Questions

Explanation:
F(12)=
2+2+2+2+2+2------1
2+2+2+3+3-----2
2+2+3+5----3
2+3+7-----4
3+3+3+3-----5
5+7-----6
2+5+5-----7 (Corrected)

Total = 7
F(12)=7

IMO-D

Please Give Kudos, If you find my explanation Good Enough

Originally posted by rajatchopra1994 on 04 Dec 2019, 01:12.
Last edited by rajatchopra1994 on 04 Dec 2019, 02:03, edited 1 time in total.
Intern
Joined: 14 Oct 2019
Posts: 1
Re: The function f(x) represents the number of ways that prime numbers can  [#permalink]

Show Tags

04 Dec 2019, 01:55
One more 5+5+2 , total 7

Posted from my mobile device
Re: The function f(x) represents the number of ways that prime numbers can   [#permalink] 04 Dec 2019, 01:55
Display posts from previous: Sort by