Last visit was: 12 Nov 2024, 12:00 It is currently 12 Nov 2024, 12:00

Close

GRE Prep 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
Your Progress

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

Practice
Pays

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

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel
GRE Prep Club Team Member
Joined: 20 Feb 2017
Posts: 2508
Own Kudos [?]: 3592 [6]
Given Kudos: 1053
GPA: 3.39
Send PM
Retired Moderator
Joined: 10 Apr 2015
Posts: 6218
Own Kudos [?]: 12186 [4]
Given Kudos: 136
Send PM
Intern
Intern
Joined: 11 Dec 2020
Posts: 13
Own Kudos [?]: 17 [0]
Given Kudos: 41
Send PM
avatar
Intern
Intern
Joined: 27 Jul 2021
Posts: 1
Own Kudos [?]: 1 [1]
Given Kudos: 0
Send PM
Re: If −4 < a < 4 and −2 < b < −1, which of the following could NOT be the [#permalink]
1
I am not convinced with the answer because

-4<a<4 that means a is less than 4 and greater than -4 that clearly means 4 is extreme value
and -2<b<-1 which means b is less than -1 and greater than -2 then -1 will be an extreme value

So , LT 4 * LT -1 = LT -4

I just want to ask WHY YOU haven't included -1 with 4 when calculating
It is so much confusing
Retired Moderator
Joined: 19 Nov 2020
Posts: 326
Own Kudos [?]: 372 [1]
Given Kudos: 64
GRE 1: Q160 V152
Send PM
If −4 < a < 4 and −2 < b < −1, which of the following could NOT be the [#permalink]
1
GeminiHeat wrote:
If −4 < a < 4 and −2 < b < −1, which of the following could NOT be the value of ab?

(A) −3

(B) 0

(C) 4

(D) 6

(E) 9


On a real number line, we always consider continuous interval for GMAT/GRE unless other has been specified (i.e., integers). Any relevant combination of a between -4 and 4 and b between -2 and -1 on a number line may result in all listed answer choices except for choice E.
Retired Moderator
Joined: 09 Jan 2021
Posts: 576
Own Kudos [?]: 845 [1]
Given Kudos: 194
GRE 1: Q167 V156
GPA: 4
WE:Analyst (Investment Banking)
Send PM
Re: If −4 < a < 4 and −2 < b < −1, which of the following could NOT be the [#permalink]
1
shishantmahato wrote:
I am not convinced with the answer because

-4<a<4 that means a is less than 4 and greater than -4 that clearly means 4 is extreme value
and -2<b<-1 which means b is less than -1 and greater than -2 then -1 will be an extreme value

So , LT 4 * LT -1 = LT -4

I just want to ask WHY YOU haven't included -1 with 4 when calculating
It is so much confusing



Hi There!

Let me try helping you out on this one!

As -4<a<4 we need number greater than -4 and not equal to -4 and similarly with -1. Thus, we can take fractions which inturn gives us the value -4. Points to note here are, we can not get 9 as the answer by any combination. For eg. as b is negative, to get a positive 9 we need a to be negative as well. And the greatest value that we get by multiplying ab is something less than 8 (not equal to, I used approximation here) and 9 can still not be found. Thus E

Let me know if I can help you further!

Hope this helps!
User avatar
GRE Prep Club Legend
GRE Prep Club Legend
Joined: 07 Jan 2021
Posts: 5008
Own Kudos [?]: 74 [0]
Given Kudos: 0
Send PM
Re: If 4 < a < 4 and 2 < b < 1, which of the following could NOT be the [#permalink]
Hello from the GRE Prep Club BumpBot!

Thanks to another GRE Prep Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
Prep Club for GRE Bot
Re: If 4 < a < 4 and 2 < b < 1, which of the following could NOT be the [#permalink]
Moderators:
GRE Instructor
78 posts
GRE Forum Moderator
37 posts
Moderator
1111 posts
GRE Instructor
234 posts

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne