Which key combination is used to permanently delete a

21 32 54 86 131 186

Find the wrong number in the given number series.

2, 4, 12, 48, 120, 1440

Find the wrong number in the given number series.

77, 101, 139, 197, 281, 413

The series given below contains a sequence of numbers.

Accordingly identify the incorrect number.

9, 14, 24, 38, 59

8137, 5405, 3669, 2701, 2201, 1997

9256    6844     4888    3350    2152    1276

3, 4, 9, 28, 116, 566, 3397 

112, 236, 374, 546, 790, 1376

Find the wrong number in the given number series.

58, 74, 61, 79, 64, 82

128, 132, 123, 139, 113, 150