In the following number series, the incorrect number is given; find out which number is wrong.
11, 28, 79, 231, 691, 2068
Show answer & explanation
Correct answer: A
Explanation
Pattern: Next=Previous×3−5
11 × 3 − 5 = 33 − 5 = 28
28 × 3 − 5 = 84 − 5 = 79
79 × 3 − 5 = 237 − 5 = 232 (given 231)
232 × 3 − 5 = 696 − 5 = 691
691 × 3 − 5 = 2073 − 5 = 2068
Hence, the correct answer is option (1).