arrow
arrow
arrow
If P is a prime number and P divides Q2\text{Q}^2Q2​, then P will NOT necessarily divide:
Question

If P is a prime number and P divides Q2\text{Q}^2​, then P will NOT necessarily divide:

A.

3Q

B.

Q + 1

C.

2Q22\text{Q}^2​​

D.

Q

Correct option is B

Solution:
Option A: 3Q ​
Since P divides Q , it must also divide 3Q (as 3Q is a multiple of Q).

P divides 3Q .
Option B: Q + 1 
P divides Q, but there is no guarantee that P divides Q + 1.
Example: Let P = 3, Q = 6.
3 divides 62=366^2 = 36​, and 3 divides 6 .
But 3 does not divide 6 + 1 = 7 .
P does not necessarily divide Q + 1 
Option C: 2Q22Q^2​​
Since P divides Q2Q^2​ , it must also divide 2Q22Q^2 ​(as 2Q2Q^2​ is a multiple of Q2).Q^2).
P divides 2Q22Q^2​​
Option D: Q 
We already established that P divides Q.
 P divides Q 
Thus, P does not necessarily divide Q + 1.
Answer (B) Q + 1.

Free Tests

Free
Must Attempt

CBT-1 Full Mock Test 1

languageIcon English
  • pdpQsnIcon100 Questions
  • pdpsheetsIcon100 Marks
  • timerIcon90 Mins
languageIcon English
Free
Must Attempt

RRB NTPC Graduate Level PYP (Held on 5 Jun 2025 S1)

languageIcon English
  • pdpQsnIcon100 Questions
  • pdpsheetsIcon100 Marks
  • timerIcon90 Mins
languageIcon English
Free
Must Attempt

CBT-1 General Awareness Section Test 1

languageIcon English
  • pdpQsnIcon40 Questions
  • pdpsheetsIcon30 Marks
  • timerIcon25 Mins
languageIcon English
test-prime-package

Access ‘RRB NTPC’ Mock Tests with

  • 60000+ Mocks and Previous Year Papers
  • Unlimited Re-Attempts
  • Personalised Report Card
  • 500% Refund on Final Selection
  • Largest Community
students-icon
354k+ students have already unlocked exclusive benefits with Test Prime!
Our Plans
Monthsup-arrow