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Which of the following is an odd prime number? 

This question was previously asked in
NPCIL Assistant Grade-1 (HR/F&A/C&MM/Steno Grade-I) Official Paper-II (Held In: 2022)
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  1. 1
  2. 3
  3. 9
  4. 15

Answer (Detailed Solution Below)

Option 2 : 3
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Detailed Solution

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Given:

Which of the following is an odd prime number?

Options:

1) 1

2) 3

3) 9

4) 15

Formula used:

A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself.

Calculation:

1: Not a prime number (it has only one divisor: 1)

3: Prime number (divisors are 1 and 3)

9: Not a prime number (divisors are 1, 3, 9)

15: Not a prime number (divisors are 1, 3, 5, 15)

∴ The correct answer is option 2 (3).

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Latest NPCIL Assistant Grade 1 Updates

Last updated on Mar 21, 2025

-> Nuclear Power Corporation of India Limited has published a comprehensive notification for the position of NPCIL Assistant Grade 1.

-> A total of 37 vacancies has been announced for the post of NPCIL Assistant Grade 1. Bookmark this page for all the latest updates.

-> Interested applicants can start submitting their online applications from 12 March 2025.

-> The application window will be closed on 1 April 2025. However the date of exam is yet to be notified.

-> Candidates can review the NPCIL Assistant Grade 1 Previous Year Papers, for better preparation!

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