BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

3-3*6+2=

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Moderator
Posts: 2058
Joined: Sun Oct 29, 2017 4:24 am
Thanked: 1 times
Followed by:5 members

3-3*6+2=

by M7MBA » Sat May 12, 2018 5:46 am

Timer

00:00

Your Answer

A

B

C

D

E

Global Stats

3-3*6+2=

A) 2
B) -13
C) -18
D) -17
E) non of the above

The OA is the option B.

Why is B? I've got D=-17. Can anyone give me some help here? Thanks.
Top
Source: — Problem Solving |

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 16207
Joined: Mon Dec 08, 2008 6:26 pm
Location: Vancouver, BC
Thanked: 5254 times
Followed by:1268 members
GMAT Score:770

by Brent@GMATPrepNow » Sat May 12, 2018 5:57 am
M7MBA wrote:3 - 3 x 6 + 2 =

A) 2
B) -13
C) -18
D) -17
E) non of the above
We must follow the order of operations (aka BEDMAS or PEMDAS)

Given: 3 - 3 x 6 + 2
Must must perform all divisions and multiplications first.
So, 3 - 3 x 6 + 2 = 3 - 18+ 2
Next, when given the options of subtraction and addition, we perform the operations from left to right
So, we get: 3 - 18 + 2 = -15 + 2
= -13

Answer: B

Cheers,
Brent
Brent Hanneson - Creator of GMATPrepNow.com
Image
Top
Legendary Member
Posts: 2898
Joined: Thu Sep 07, 2017 2:49 pm
Thanked: 6 times
Followed by:5 members

by Vincen » Sat May 12, 2018 6:37 am
M7MBA wrote:3-3*6+2=

A) 2
B) -13
C) -18
D) -17
E) non of the above

The OA is the option B.

Why is B? I've got D=-17. Can anyone give me some help here? Thanks.
Hello M7MBA.

Let's see. The given expression is the same as $$3-\left(3\cdot6\right)+2\ .$$ Just that it last one has parenthesis. If we solve it, we will obtain: $$3-\left(3\cdot6\right)+2\ =3-\left(18\right)+2=5-18=-13.$$ Therefore, the correct answer is the option B.

I think you got the wrong answer because you solved the following equation: $$3-\left(3\cdot6+2\right)\ =3-\left(18+2\right)=3-20=-17.$$
Top

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 8083
Joined: Sat Apr 25, 2015 10:56 am
Location: Los Angeles, CA
Thanked: 43 times
Followed by:29 members

by Scott@TargetTestPrep » Tue May 07, 2019 5:38 pm
M7MBA wrote:3-3*6+2=

A) 2
B) -13
C) -18
D) -17
E) non of the above

The OA is the option B.
Simplifying, we have:

3 - 18 + 2 = -15 + 2 = -13

Answer: B

Scott Woodbury-Stewart
Founder and CEO
[email protected]

Image

See why Target Test Prep is rated 5 out of 5 stars on BEAT the GMAT. Read our reviews

ImageImage
Top

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 8083
Joined: Sat Apr 25, 2015 10:56 am
Location: Los Angeles, CA
Thanked: 43 times
Followed by:29 members

by Scott@TargetTestPrep » Tue May 07, 2019 5:38 pm
M7MBA wrote:3-3*6+2=

A) 2
B) -13
C) -18
D) -17
E) non of the above

The OA is the option B.
Simplifying, we have:

3 - 18 + 2 = -15 + 2 = -13

Answer: B

Scott Woodbury-Stewart
Founder and CEO
[email protected]

Image

See why Target Test Prep is rated 5 out of 5 stars on BEAT the GMAT. Read our reviews

ImageImage
Top
Post new topic Post Reply
• Page 1 of 1