Complete the series.
91, 86, __, 76, 71
Show answer & explanation
Correct answer: B
Explanation
Given series: 91, 86, _, 76, 71
The series decreases by 5 each step.
91 − 5 = 86
86 − 5 = 81
81 − 5 = 76
76 − 5 = 71
Hence the missing number is 81.
Option (2) is the correct answer.