GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 16 Dec 2018, 04:50

### 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

## Events & Promotions

###### Events & Promotions in December
PrevNext
SuMoTuWeThFrSa
2526272829301
2345678
9101112131415
16171819202122
23242526272829
303112345
Open Detailed Calendar
• ### FREE Quant Workshop by e-GMAT!

December 16, 2018

December 16, 2018

07:00 AM PST

09:00 AM PST

Get personalized insights on how to achieve your Target Quant Score.
• ### Free GMAT Prep Hour

December 16, 2018

December 16, 2018

03:00 PM EST

04:00 PM EST

Strategies and techniques for approaching featured GMAT topics

# What is the value of A + C? (1) A + B = 10 (2) B + C = 20

Author Message
TAGS:

### Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 51223
What is the value of A + C? (1) A + B = 10 (2) B + C = 20  [#permalink]

### Show Tags

03 Jul 2018, 09:57
00:00

Difficulty:

35% (medium)

Question Stats:

68% (01:05) correct 32% (00:30) wrong based on 27 sessions

### HideShow timer Statistics

What is the value of A + C?

(1) A + B = 10
(2) B + C = 20

_________________
Director
Status: Learning stage
Joined: 01 Oct 2017
Posts: 931
WE: Supply Chain Management (Energy and Utilities)
Re: What is the value of A + C? (1) A + B = 10 (2) B + C = 20  [#permalink]

### Show Tags

04 Jul 2018, 19:12
Bunuel wrote:
What is the value of A + C?

(1) A + B = 10
(2) B + C = 20

Question stem:- A+C=?

Statement-1
A+B=10
No information is provided about C.
So, A+C can have more than one value. Hence, insufficient.
Statement-2
B+C=20
No information is provided about A.
So, A+C can have more than one value. Hence, insufficient.
(1)+(2), we have 2 equations and 3 variables, hence we can't calculate A+C definitely. A+C can have more than one value.
Hence, insufficient.

Ans. (E)
_________________

Regards,

PKN

Rise above the storm, you will find the sunshine

e-GMAT Representative
Joined: 04 Jan 2015
Posts: 2313
What is the value of A + C? (1) A + B = 10 (2) B + C = 20  [#permalink]

### Show Tags

05 Jul 2018, 03:29

Solution

To find:
• The value of A + C

Analysing Statement 1
“A + B = 10” …………………………. (1)
• From this statement, we cannot find the value of A + C as we don’t have any information about C

Therefore, Statement (1) ALONE is not sufficient to answer this question

Analysing Statement 2
“B + C = 20” …………………………. (2)
• From this statement, we cannot find the value of A + C as we don’t have any information about A

Therefore, Statement (2) ALONE is not sufficient to answer this question

Combining Both Statements
• To get the value of A + C, we need to add the two equations. (1) + (2) gives,
o (A + B) + (B + C) = 30
o A + 2B + C = 30
o (A +C) + 2B = 30
• To find the value of A + C, we should have some additional information about B
• However, we don’t have any information about B

Thus, Statement (1) and (2) TOGETHER are NOT sufficient

Hence, the correct answer is option E.

_________________

Number Properties | Algebra |Quant Workshop

Success Stories
Guillermo's Success Story | Carrie's Success Story

Ace GMAT quant
Articles and Question to reach Q51 | Question of the week

Number Properties – Even Odd | LCM GCD | Statistics-1 | Statistics-2 | Remainders-1 | Remainders-2
Word Problems – Percentage 1 | Percentage 2 | Time and Work 1 | Time and Work 2 | Time, Speed and Distance 1 | Time, Speed and Distance 2
Advanced Topics- Permutation and Combination 1 | Permutation and Combination 2 | Permutation and Combination 3 | Probability
Geometry- Triangles 1 | Triangles 2 | Triangles 3 | Common Mistakes in Geometry
Algebra- Wavy line | Inequalities

Practice Questions
Number Properties 1 | Number Properties 2 | Algebra 1 | Geometry | Prime Numbers | Absolute value equations | Sets

| '4 out of Top 5' Instructors on gmatclub | 70 point improvement guarantee | www.e-gmat.com

What is the value of A + C? (1) A + B = 10 (2) B + C = 20 &nbs [#permalink] 05 Jul 2018, 03:29
Display posts from previous: Sort by