Question

What is the 8th number in the geometric sequence 8, 16, 32, 64, 128...?

Answer 1

2¹¹

Explanation:

8th term is given by,

ar⁷

Here a is first term and r is common ratio.

ar⁷ = 16 × 2⁷ = 2⁴ × 2⁷ = 2¹¹

So 2¹¹ is the answer.