Forum Home > GMAT > Quantitative > Problem Solving (PS)
Events & Promotions
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
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Aug 2211:00 AM EDT
-11:59 PM EDT
More and more TTP students are earning impressive scores on the GMAT. Now is the perfect time to join the many GMAT students who made the switch to TTP and surpassed their wildest expectations on test day.
Aug 2910:00 PM IST
-11:30 PM IST
With brand new features like:AI-driven Planner tool, 850+ data Insights practice questions and GMAT Focus Edition Adaptive mock tests with ESR+ analysis and personal mentor support, our course is the most comprehensive course for GMAT Focus Edition.
Aug 3112:00 PM EDT
-03:00 PM EDT
Save 20% on Target Test Prep and Score in the 100th Percentile in GMAT Verbal! Our course uses techniques such as topical study and spaced repetition to maximize knowledge retention and make studying simple and fun.
Aug 3103:00 PM EDT
-11:59 PM EDT
For a limited time use code FALL20 to save on prep. Valid on Complete Course, Advanced Course, Bootcamp Course, Tutoring, and the Executive Assessment Course. This discount ends September 16th.
Sep 0212:01 AM PDT
-11:59 PM PDT
On Monday the 2nd, GMAT Club Tests will be Absolutely Free! Including all the Quizzes, Questions, and Tests. 12 AM - 11:59 PM PST- Sep 07
11:00 AM IST
-01:00 PM IST
Attend this session to learn how to Deconstruct arguments, Pre-Think Author’s Assumptions, and apply Negation Test.
The function f(x) is equal to the square of a number lessened by 5. Th
[#permalink]
27 Mar 2019, 02:02
27 Mar 2019, 02:02
1
Bookmarks
Show timer
00:00
A
B
C
D
E
Difficulty:
5%
(low)
Question Stats:
88% (00:51) correct
12%
(01:34)
wrong
based on 60
sessions
The function f(x) is equal to the square of a number lessened by 5. The function g(x) is equal to a number tripled. What is f(g(2)) ?
a. 4
b. 7
c. 13
d. 22
e. 31
Source : Barron's GMAT
a. 4
b. 7
c. 13
d. 22
e. 31
Source : Barron's GMAT
e-GMAT Representative
Joined: 04 Jan 2015
Posts: 3710
Given Kudos: 165
Re: The function f(x) is equal to the square of a number lessened by 5. Th
[#permalink]
23 Apr 2019, 00:20
23 Apr 2019, 00:20
1
Kudos
Expert Reply
Solution
Given:
- • The function \(f(x) = x^2 – 5\)
• The function \(g(x) = x * 3\)
To find:
- • The value of \(f(g(2))\)
Approach and Working:
As \(g(x) = x * 3\),
- • The value of \(g(2) = 2 * 3 = 6\)
Therefore, \(f(g(2)) = f(6) = 6^2 – 5 = 36 – 5 = 31\)
Hence, the correct answer is option E.
Answer: E
Director
Joined: 18 Jul 2018
Posts: 918
Given Kudos: 95
Location: India
Concentration: Operations, General Management
Schools: IIMB EPGP'22 (M)
GMAT 1: 590 Q46 V25 
GMAT 2: 690 Q49 V34
WE:Engineering (Energy and Utilities)
Re: The function f(x) is equal to the square of a number lessened by 5. Th
[#permalink]
27 Mar 2019, 10:10
27 Mar 2019, 10:10
Let the number be x.
Now, f(x) = x^2-5
g(x) = 3x.
f(g(2)) = g(2)^2-5
g(2) = 3*2 = 6.
f(g(2)) = 36-5 = 31
E is the answer
Now, f(x) = x^2-5
g(x) = 3x.
f(g(2)) = g(2)^2-5
g(2) = 3*2 = 6.
f(g(2)) = 36-5 = 31
E is the answer
