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

 It is currently 19 Feb 2019, 09:32

### 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 February
PrevNext
SuMoTuWeThFrSa
272829303112
3456789
10111213141516
17181920212223
242526272812
Open Detailed Calendar
• ### Free GMAT Prep Hour

February 20, 2019

February 20, 2019

08:00 PM EST

09:00 PM EST

Strategies and techniques for approaching featured GMAT topics. Wednesday, February 20th at 8 PM EST

February 21, 2019

February 21, 2019

10:00 PM PST

11:00 PM PST

Kick off your 2019 GMAT prep with a free 7-day boot camp that includes free online lessons, webinars, and a full GMAT course access. Limited for the first 99 registrants! Feb. 21st until the 27th.

# If a and b are both factors of 50, which of the following must be true

Author Message
TAGS:

### Hide Tags

Manager
Joined: 03 Mar 2018
Posts: 215
If a and b are both factors of 50, which of the following must be true  [#permalink]

### Show Tags

16 Apr 2018, 11:38
5
00:00

Difficulty:

85% (hard)

Question Stats:

44% (01:48) correct 56% (01:41) wrong based on 146 sessions

### HideShow timer Statistics

If a and b are both factors of 50, which of the following must be true?

(A) ab≥ 2
(B) a + b≤ 50
(C) ab is a factor of 100.
(D) ab is a factor of 2500.
(E) ab is even.

_________________

Senior Manager
Joined: 29 Dec 2017
Posts: 385
Location: United States
Concentration: Marketing, Technology
GMAT 1: 630 Q44 V33
GMAT 2: 690 Q47 V37
GMAT 3: 710 Q50 V37
GPA: 3.25
WE: Marketing (Telecommunications)
If a and b are both factors of 50, which of the following must be true  [#permalink]

### Show Tags

16 Apr 2018, 12:32
1
itisSheldon wrote:
If a and b are both factors of 50, which of the following must be true?

(A) ab≥ 2
(B) a + b≤ 50
(C) ab is a factor of 100.
(D) ab is a factor of 2500.
(E) ab is even.

Notice that A and B can be the same numbers as 1 and 1 ; 50 and 50 etc.

(A) 1*1≥ 2 - NO
(B) 50 + 50≤ 50 - NO
(C) 2*2 = 4 ab is a factor of 100 - NO
(D) ab is a factor of 2500 - YES
(E) 1*1=1 ab is even - NO.
Director
Joined: 02 Oct 2017
Posts: 734
Re: If a and b are both factors of 50, which of the following must be true  [#permalink]

### Show Tags

01 May 2018, 08:12
Factor can be +ve as well as -ve

I) if one is positive and other is negative then this choice is incorrect

II)if a is 50 and b is 1 then this choice is incorrect

III)if a is 25 and b is 50 then this would be incorrect

IV)this choice corrects all cases.so it is answer

V)a and b can be 1 and -1 then this would be incorrect

Posted from my mobile device
_________________

Give kudos if you like the post

Manager
Joined: 31 Jul 2017
Posts: 189
Location: India
GMAT 1: 500 Q47 V15
GPA: 3.4
WE: Information Technology (Computer Software)
Re: If a and b are both factors of 50, which of the following must be true  [#permalink]

### Show Tags

05 Sep 2018, 20:28
itisSheldon wrote:
If a and b are both factors of 50, which of the following must be true?

(A) ab≥ 2
(B) a + b≤ 50
(C) ab is a factor of 100.
(D) ab is a factor of 2500.
(E) ab is even.

Notice that A and B can be the same numbers as 1 and 1 ; 25 and 25 ; 50 and 50 etc.

(A) 1*1≥ 2 - NO (for a =1 & b =1)
(B) 50 + 1 ≤ 50 - NO (for a =1 & b =50)
(C) 25*25 = 625 ab is a factor of 100 - NO (for a =25 & b =25)
(D) ab is a factor of 2500 - YES ( We can take any factor. This satisfies)
(E) 1*1=1 ab is even - NO. (for a =1 & b =1)

Ans - D
_________________

If it helps you please press Kudos!

Thank You
Sudhanshu

VP
Joined: 31 Oct 2013
Posts: 1136
Concentration: Accounting, Finance
GPA: 3.68
WE: Analyst (Accounting)
If a and b are both factors of 50, which of the following must be true  [#permalink]

### Show Tags

07 Sep 2018, 21:47
itisSheldon wrote:
If a and b are both factors of 50, which of the following must be true?

(A) ab≥ 2
(B) a + b≤ 50
(C) ab is a factor of 100.
(D) ab is a factor of 2500.
(E) ab is even.

probable factors of 50: Note: a and b both are factors of 50.

a = 1 , 2 , 5, 10, 25, 50
b = 1, 2 , 5 , 10 25, 50

A) Not true. ab could be 1.
B) a + b≤ 50 . not always true. a = 50 b = 50 . a +b = 100.
C) suppose ab = 50*50 = 2500. Not always true.
D) ab = 50*50, which is max . is a factor of 2500. True. In all cases it is true.

If a and b are both factors of 50, which of the following must be true   [#permalink] 07 Sep 2018, 21:47
Display posts from previous: Sort by