Contact:
sales@biotechnologyforums.com to feature here

Thread Rating:
  • 1 Vote(s) - 5 Average
  • 1
  • 2
  • 3
  • 4
  • 5
Aptitude Question: A student sent 120 emails in 5 days. Each day....
#5
(02-07-2017, 04:44 PM)Raj Mohan Wrote: Let total no.of mails =  't'
Mails sent on first day  = 'x'
No.of mails sent more than the previous = 'k'
No.of days, mails were sent  ='n'

nth term = 'x+(n-1)k'
Sum of n terms  totals down to total no.of mails sent i.e 't'
t = (x)+(x+k)+(x+2k)+(x+3k)+...+(x+(n-1)k)
t = (nx )+ k.n.(n-1)/2

12000 = 50x + 10.50.49/2
12000 = 50x + 12250
    50x = 250
        x = 5

Thanks Raj for the structured and universal approach!
Sunil Nagpal
MS(Research) Scholar, IIT Delhi (Alumnus)
Advisor for the Biotech Students portal (BiotechStudents.com)
Computational Researcher in BioSciences at a leading MNC


Suggested Reads:
Top Biotech Companies | Top places to work
Indian Biotech Companies and Job Openings
Aiming a PhD in Top Grad School? | These are the Important Points to Consider
Careers in Biotechnology | A list of various Options
Biotechnology Competitive Exams in India
#6
(02-07-2017, 04:44 PM)Raj Mohan Wrote: Let total no.of mails = 't'
Mails sent on first day = 'x'
No.of mails sent more than the previous = 'k'
No.of days, mails were sent ='n'

nth term = 'x+(n-1)k'
Sum of n terms totals down to total no.of mails sent i.e 't'
t = (x)+(x+k)+(x+2k)+(x+3k)+...+(x+(n-1)k)
t = (nx )+ k.n.(n-1)/2

12000 = 50x + 10.50.49/2
12000 = 50x + 12250
50x = 250
x = 5

Super approach
  


Possibly Related Threads...
Thread Author Replies Views Last Post
  A classical question: "Why does 3'-5' polarity of DNA strand acts as template?" SunilNagpal 2 998 02-27-2017, 04:00 AM
Last Post: travellingsalesman
  Bioprocess GATE Question Sharmin Calcuttawala 3 2,832 12-21-2016, 05:22 PM
Last Post: Rooby yadav
  Career Guidance for a biotechnology Student ayeshanihalani@gmail.com 1 1,571 10-04-2016, 04:37 PM
Last Post: SunilNagpal
  Career options for a Biochemistry student Himanshu 9 7,248 07-05-2016, 02:19 AM
Last Post: Himanshu
  +2 Comp.Science ( Maths, Chem, Phys ) Student can get seat in BTech Bio Technology kannan 2 2,044 04-14-2016, 11:03 PM
Last Post: Mrunalini



Users browsing this thread:
2 Guest(s)

Aptitude Question: A student sent 120 emails in 5 days. Each day....51