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  9. Q70

RRB NTPC 2026 · Question 70 of 93

The sum of the first pair of two-digit twin prime numbers is:

  1. A22
  2. B26
  3. C24Correct
  4. D28

Answer: C. 24

Explanation

Given: Twin primes are primes with a difference of 2. Solution: The first two-digit prime numbers are 11, 13, 17, 19... The first pair of two-digit twin primes is (11, 13). Sum = 11 + 13 = 24 So the correct answer is (c)

Source: RRB NTPC CBT-I Memory-Based Paper 16 March 2026 S1 (careerpower test-platform compilation) · memory-based

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