What is the primary characteristic that defines "big

169, 224, 293, 385, 497, 629

Find the wrong number in the given number series.

20, 33, 50, 69, 93, 121

25    26     28      32     42      56

Find the wrong number in the given number series.

8, 12, 23, 40, 66, 103

8137, 5405, 3669, 2701, 2201, 1997

Find the wrong number in the given number series.

78, 66, 51, 39, 20, 12

2824     2314      1973     1759     1634     1574

In each of the following number series, one term is wrong. Find the wrong term.

3, 7, 13, 21, 31, 42, 57

Find the wrong term in the given series below.

2847, 2954, 2799, 3088, 2727, 3256

Find the wrong number in the given number series.

2, 5, 10, 17, 26, 38, 50