Complete the series.
10, 20, 18, 36, 34, 68, ___
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 66.
Given series: 10, 20, 18, 36, 34, 68, ___
10 × 2 = 20, 20 - 2 = 18, 18 × 2 = 36, 36 - 2 = 34, 34 × 2 = 68, 68 - 2 = 66