Question
Download Solution PDFIf Σn = 36, find n
This question was previously asked in
DSSSB Pharmacist 2014: Previous Year Paper
Answer (Detailed Solution Below)
Option 2 : 8
Detailed Solution
Download Solution PDFGiven:
Σn = 36
Formula used:
Σn = n(n + 1) / 2
Where,
Σn = sum of the first n natural numbers
Calculation:
Σn = 36
We need to find n such that
n(n + 1) / 2 = 36
⇒ n(n + 1) = 72
⇒ n2 + n - 72 = 0
⇒ (n - 8) (n + 9) = 0
Taking the positive value, n - 8 = 0
So, n = 8
Latest DSSSB Pharmacist Updates
Last updated on Mar 27, 2025
-> The DSSSB Pharmacist Exam for Advt. No. 04/2024 will be held from 5th to 7th May 2025.
-> DSSSB Pharmacist Notification was released for 2 vacancies (Advt. No. 05/2024), and 318 vacancies (Advt. No. 01/2024)
-> Candidates with a Bachelor's degree in Pharmacy are eligible to apply for the post.
-> The selection process includes a written test (One Tier Technical Examination) for 200 marks.
India’s #1 Learning Platform
Start Complete Exam Preparation
Daily Live MasterClasses
Practice Question Bank
Mock Tests & Quizzes
Trusted by 7.2 Crore+ Students