May 24 10:00 PM PDT  11:00 PM PDT Join a FREE 1day workshop and learn how to ace the GMAT while keeping your fulltime job. Limited for the first 99 registrants. May 25 07:00 AM PDT  09:00 AM PDT Attend this webinar and master GMAT SC in 10 days by learning how meaning and logic can help you tackle 700+ level SC questions with ease. May 27 01:00 AM PDT  11:59 PM PDT All GMAT Club Tests are free and open on May 27th for Memorial Day! May 27 10:00 PM PDT  11:00 PM PDT Special savings are here for Magoosh GMAT Prep! Even better  save 20% on the plan of your choice, now through midnight on Tuesday, 5/27 May 30 10:00 PM PDT  11:00 PM PDT Application deadlines are just around the corner, so now’s the time to start studying for the GMAT! Start today and save 25% on your GMAT prep. Valid until May 30th.
Author 
Message 
TAGS:

Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 55272

In a certain sequence of 8 numbers, each number after the first is 1
[#permalink]
Show Tags
15 Oct 2015, 21:56
Question Stats:
83% (00:39) correct 17% (00:43) wrong based on 915 sessions
HideShow timer Statistics
In a certain sequence of 8 numbers, each number after the first is 1 more than the previous number. If the first number is −5, how many of the numbers in the sequence are positive? (A) None (B) One (C) Two (D) Three (E) Four Kudos for a correct solution.
Official Answer and Stats are available only to registered users. Register/ Login.
_________________



Senior Manager
Joined: 10 Mar 2013
Posts: 495
Location: Germany
Concentration: Finance, Entrepreneurship
GPA: 3.88
WE: Information Technology (Consulting)

Re: In a certain sequence of 8 numbers, each number after the first is 1
[#permalink]
Show Tags
15 Oct 2015, 23:55
Bunuel wrote: In a certain sequence of 8 numbers, each number after the first is 1 more than the previous number. If the first number is −5, how many of the numbers in the sequence are positive?
(A) None (B) One (C) Two (D) Three (E) Four
Kudos for a correct solution. 5,4,3,2,1,0,1,2 Answer (C)
_________________
When you’re up, your friends know who you are. When you’re down, you know who your friends are.
Share some Kudos, if my posts help you. Thank you !
800Score ONLY QUANT CAT1 51, CAT2 50, CAT3 50 GMAT PREP 670 MGMAT CAT 630 KAPLAN CAT 660



SVP
Status: It's near  I can see.
Joined: 13 Apr 2013
Posts: 1674
Location: India
Concentration: International Business, Operations
GPA: 3.01
WE: Engineering (Real Estate)

Re: In a certain sequence of 8 numbers, each number after the first is 1
[#permalink]
Show Tags
16 Oct 2015, 00:04
Bunuel wrote: In a certain sequence of 8 numbers, each number after the first is 1 more than the previous number. If the first number is −5, how many of the numbers in the sequence are positive?
(A) None (B) One (C) Two (D) Three (E) Four
Kudos for a correct solution. My Solution:
5, 4, 3, 2, 1, 0, 1, 2
So only two numbers are positive (1 & 2) Answer C
_________________
"Do not watch clock; Do what it does. KEEP GOING."



Verbal Forum Moderator
Status: Greatness begins beyond your comfort zone
Joined: 08 Dec 2013
Posts: 2291
Location: India
Concentration: General Management, Strategy
GPA: 3.2
WE: Information Technology (Consulting)

Re: In a certain sequence of 8 numbers, each number after the first is 1
[#permalink]
Show Tags
16 Oct 2015, 02:39
First term , a1 = 5 Common difference ,d =1 An= a1+(n1)d 0 = 5 +(n1)1 = 5 + n  1 = n  6 => n = 6 Therefore, the number of terms which are positive is 86 =2 The list is 5 , 4 , 3 , 2 , 1 , 0 , 1 , 2 Number of terms which are positive = 2
_________________
When everything seems to be going against you, remember that the airplane takes off against the wind, not with it.  Henry Ford The Moment You Think About Giving Up, Think Of The Reason Why You Held On So Long +1 Kudos if you find this post helpful



Manager
Joined: 26 Dec 2012
Posts: 146
Location: United States
Concentration: Technology, Social Entrepreneurship
WE: Information Technology (Computer Software)

Re: In a certain sequence of 8 numbers, each number after the first is 1
[#permalink]
Show Tags
16 Oct 2015, 07:44
we have 0,1,2 as the non negative numbers; o is a positive number. hence we have three positive numbers. Answer is D
Thanks



Manager
Joined: 13 Mar 2013
Posts: 162
Location: United States
Concentration: Leadership, Technology
GPA: 3.5
WE: Engineering (Telecommunications)

Re: In a certain sequence of 8 numbers, each number after the first is 1
[#permalink]
Show Tags
16 Oct 2015, 22:51
In a certain sequence of 8 numbers, each number after the first is 1 more than the previous number. If the first number is −5, how many of the numbers in the sequence are positive? (A) None (B) One (C) Two (D) Three (E) Four In GMAT Zero is considered as an integer which is neither positive nor negative. Non  Negative ( zero to positive infinity ) Solution to the question : 5,4,3,2,1,0 , 1,2 Hence ans is 2 ..option C
_________________



Manager
Joined: 30 Dec 2015
Posts: 84
GPA: 3.92
WE: Engineering (Aerospace and Defense)

Re: In a certain sequence of 8 numbers, each number after the first is 1
[#permalink]
Show Tags
30 Dec 2015, 23:47
Skywalker18 wrote: First term , a1 = 5 Common difference ,d =1 An= a1+(n1)d 0 = 5 +(n1)1 = 5 + n  1 = n  6 => n = 6 Therefore, the number of terms which are positive is 86 =2
The list is 5 , 4 , 3 , 2 , 1 , 0 , 1 , 2 Number of terms which are positive = 2 Hey Skywalker, appreciate if you could explain the first part of your solution??
_________________
If you analyze enough data, you can predict the future.....its calculating probability, nothing more!



Verbal Forum Moderator
Status: Greatness begins beyond your comfort zone
Joined: 08 Dec 2013
Posts: 2291
Location: India
Concentration: General Management, Strategy
GPA: 3.2
WE: Information Technology (Consulting)

Re: In a certain sequence of 8 numbers, each number after the first is 1
[#permalink]
Show Tags
31 Dec 2015, 00:09
colorblind wrote: Skywalker18 wrote: First term , a1 = 5 Common difference ,d =1 An= a1+(n1)d 0 = 5 +(n1)1 = 5 + n  1 = n  6 => n = 6 Therefore, the number of terms which are positive is 86 =2
The list is 5 , 4 , 3 , 2 , 1 , 0 , 1 , 2 Number of terms which are positive = 2 Hey Skywalker, appreciate if you could explain the first part of your solution?? Hi colorblind , Please find the highlighted explanation in Blue . First term , a1 = 5 Common difference ,d =1 (each number after the first is 1 more than the previous number )The below is the formula for A.P An= a1+(n1)d To find number of positive terms in the sequence we need to need number of integers equal to or less than 0. So , i have calculated the position of 0 in the sequence . Zero is the 6th term in the sequence0 = 5 +(n1)1 = 5 + n  1 = n  6 => n = 6 Therefore, the number of terms which are positive is 86 =2 Hope it helps !!
_________________
When everything seems to be going against you, remember that the airplane takes off against the wind, not with it.  Henry Ford The Moment You Think About Giving Up, Think Of The Reason Why You Held On So Long +1 Kudos if you find this post helpful



Manager
Joined: 30 Dec 2015
Posts: 84
GPA: 3.92
WE: Engineering (Aerospace and Defense)

Re: In a certain sequence of 8 numbers, each number after the first is 1
[#permalink]
Show Tags
31 Dec 2015, 08:13
Skywalker18 wrote: First term , a1 = 5 Common difference ,d =1 An= a1+(n1)d 0 = 5 +(n1)1 = 5 + n  1 = n  6 => n = 6 Therefore, the number of terms which are positive is 86 =2
The list is 5 , 4 , 3 , 2 , 1 , 0 , 1 , 2 Number of terms which are positive = 2 Hi Skywalker, Thanks for the response, so: An is the value of the nth term = 0 A1 is the first term = 5 n is the term number of interest =to find d is the difference = 1 An = A1 + (n1)d 0 = 5 + (n1)*1 n = 6 So this formula comes handy for big set of numbers! Great, I have never used this formula before. Thanks again!
_________________
If you analyze enough data, you can predict the future.....its calculating probability, nothing more!



Intern
Joined: 28 Dec 2015
Posts: 1

Re: In a certain sequence of 8 numbers, each number after the first is 1
[#permalink]
Show Tags
10 Jan 2016, 10:12
Hi Bunuel, thank you for your valuable posts, they are well explained and very complete! I have one question about 0 number in the GMAT: According to GMAT rules, 0 is considered as non negative and non positive, but in this example above, it is considered as positive number. Could you please exaplin me in which conditions can we consider it as positive? Also, is it an even or odd number? Thank you for your help!



SVP
Status: It's near  I can see.
Joined: 13 Apr 2013
Posts: 1674
Location: India
Concentration: International Business, Operations
GPA: 3.01
WE: Engineering (Real Estate)

In a certain sequence of 8 numbers, each number after the first is 1
[#permalink]
Show Tags
10 Jan 2016, 10:39
KariLouise wrote: Hi Bunuel, thank you for your valuable posts, they are well explained and very complete! I have one question about 0 number in the GMAT: According to GMAT rules, 0 is considered as non negative and non positive, but in this example above, it is considered as positive number. Could you please exaplin me in which conditions can we consider it as positive? Also, is it an even or odd number? Thank you for your help! 1. 0 is neither negative nor positive. In this question zero is not considered positive. Only digits 1 and 2 are considered positive. 2. Nonnegative integers include "0" 2. 0 is an even number.
_________________
"Do not watch clock; Do what it does. KEEP GOING."



Math Expert
Joined: 02 Sep 2009
Posts: 55272

Re: In a certain sequence of 8 numbers, each number after the first is 1
[#permalink]
Show Tags
10 Jan 2016, 10:55
KariLouise wrote: Hi Bunuel, thank you for your valuable posts, they are well explained and very complete! I have one question about 0 number in the GMAT: According to GMAT rules, 0 is considered as non negative and non positive, but in this example above, it is considered as positive number. Could you please exaplin me in which conditions can we consider it as positive? Also, is it an even or odd number? Thank you for your help! Where above is 0 considered as positive??? ZERO:1. 0 is an integer. 2. 0 is an even integer. An even number is an integer that is "evenly divisible" by 2, i.e., divisible by 2 without a remainder and as zero is evenly divisible by 2 then it must be even. 3. 0 is neither positive nor negative integer (the only one of this kind). 4. 0 is divisible by EVERY integer except 0 itself. Check more here: numberpropertiestipsandhints174996.html
_________________



NonHuman User
Joined: 09 Sep 2013
Posts: 11008

Re: In a certain sequence of 8 numbers, each number after the first is 1
[#permalink]
Show Tags
29 Sep 2018, 09:15
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.
_________________




Re: In a certain sequence of 8 numbers, each number after the first is 1
[#permalink]
29 Sep 2018, 09:15






