Last visit was: 18 Jul 2025, 19:59 It is currently 18 Jul 2025, 19:59
Close
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
Your Progress

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
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Close
Request Expert Reply
Confirm Cancel
User avatar
Bunuel
User avatar
Math Expert
Joined: 02 Sep 2009
Last visit: 18 Jul 2025
Posts: 102,619
Own Kudos:
Given Kudos: 98,235
Products:
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
Posts: 102,619
Kudos: 742,553
 [14]
Kudos
Add Kudos
14
Bookmarks
Bookmark this Post
User avatar
Divyadisha
User avatar
Current Student
Joined: 18 Oct 2014
Last visit: 01 Jun 2018
Posts: 667
Own Kudos:
1,893
 [2]
Given Kudos: 69
Location: United States
GMAT 1: 660 Q49 V31
GPA: 3.98
GMAT 1: 660 Q49 V31
Posts: 667
Kudos: 1,893
 [2]
1
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
AbdurRakib
Joined: 11 May 2014
Last visit: 22 Jun 2025
Posts: 468
Own Kudos:
Given Kudos: 220
Status:I don't stop when I'm Tired,I stop when I'm done
Location: Bangladesh
Concentration: Finance, Leadership
GPA: 2.81
WE:Business Development (Real Estate)
Posts: 468
Kudos: 41,865
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
adiagr
Joined: 18 Jan 2010
Last visit: 05 Oct 2019
Posts: 204
Own Kudos:
1,097
 [1]
Given Kudos: 9
GMAT 1: 710 Q48 V40
Posts: 204
Kudos: 1,097
 [1]
1
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Bunuel
If d is a positive integer, is \(\sqrt{d}\) greater than 15?

(1) d is divisible by 25.
(2) d is divisible by 40.

Taking Numbers would help.

Statement 1: d is divisible by 25

say d = 25; then d is divisible by 25, now \(\sqrt{25}\) = 5; it is less than 15
say d = 625; then d is divisible by 25, now \(\sqrt{625}\) = 25; it is greater than 15

Not sufficient.

Statement 1: d is divisible by 40

say d = 40; then d is divisible by 40, now \(\sqrt{40}\) = 2 * roughly (3.5), it is certainly less than 15
say d = 400; then d is divisible by 40, now \(\sqrt{400}\) = 20; it is greater than 15

Not sufficient.

Combining Statement 1 and 2: d is divisible by 40 and 25 both

Least value of such number would be 200 (LCM of 40 and 25).

say d = 200; then d is divisible by 40 and 25, now \(\sqrt{200}\) = 10 * 1.414, it is certainly less than 15
say d = 400; then d is divisible by 40 and 25, now \(\sqrt{400}\) = 20; it is greater than 15

Not sufficient.

Answer: E
User avatar
vishalkazone
Joined: 08 Sep 2008
Last visit: 22 Mar 2024
Posts: 104
Own Kudos:
Given Kudos: 17
Location: India
Concentration: Operations, General Management
Schools: ISB '20
GPA: 3.8
WE:Operations (Transportation)
Schools: ISB '20
Posts: 104
Kudos: 109
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Question
Is D> 225?
St:1
d is divisible by 25.
When d=25 answer is no
When d=250 answer is yes
Not sufficient

St-2
d is divisible by 40.
When d=40 answer is no
When d=400 answer is yes
Not sufficient

Combine:
D is divisible by 25 and 40
LCM of 25 and 40 =200
When d=200 answer is no
When d=1000 answer is yes
Ans: E
User avatar
bumpbot
User avatar
Non-Human User
Joined: 09 Sep 2013
Last visit: 04 Jan 2021
Posts: 37,453
Own Kudos:
Posts: 37,453
Kudos: 1,013
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Hello from the GMAT Club BumpBot!

Thanks to another GMAT 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.
Moderators:
Math Expert
102619 posts
454 posts