Number series – fill the missing term in the “×2 + 2” sequence: 2, 6, 14, 30, …, 126, ?

Difficulty: Easy

Correct Answer: 62

Explanation:


Introduction / Context:
A classic construction is “multiply by 2 then add 2.” Apply it successively to recover the hidden term(s).



Observation / Approach:

  • 2 → 6: 2*2 + 2
  • 6 → 14: 6*2 + 2
  • 14 → 30: 14*2 + 2
  • 30 → 62: 30*2 + 2 (missing term)
  • 62 → 126: 62*2 + 2


Step-by-Step Solution:
Compute 30*2 + 2 = 62.



Verification / Alternative check:
Continuing the same rule gives the subsequent value 126 exactly.



Why Other Options Are Wrong:
63, 73, 95, 130 do not match the strict “×2 + 2” progression between 30 and 126.



Common Pitfalls:
Switching to additive-only patterns; here multiplication precedes the constant addition.



Final Answer:
62

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