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Logical Puzzles Hard 2 min

A sequence starts with 2. Each new term is obtained by multiplying the previous term by 2 and subtracting 1. What is the fifth term?

Hint
Generate the sequence one term at a time.

Answer

17.

Explanation

The sequence is 2, 3, 5, 9, 17.

Step-by-Step Solution

a1 = 2
a2 = 2 × 2 - 1 = 3
a3 = 2 × 3 - 1 = 5
a4 = 2 × 5 - 1 = 9
a5 = 2 × 9 - 1 = 17
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