From the given options, select the number that can replace the question mark (?) in the following sequence.
25, 18, 13, 10,?

Correct option is D

Correct Answer: (D) 8

Explanation:

• 25 → 18 – Correct Pattern

  • Difference: $25-18=7\; (prime\; Number)$

• 18 → 13 – Correct Pattern

  • Difference: $18-13=5\; (Prime\; Number)$

• 13 → 10 – Correct Pattern

  • Difference: $13-10=3\; (Prime\; Number)$

• Pattern Analysis – Correct

  • The differences are: $7,5,3$

  • These are consecutive decreasing prime numbers.

  • Next difference should be $2$.

• 10 → ? – Correct Calculation

  • $10-2=8$