Which operator is used to combine results of two SELECT

In each of the following giving number series, a wrong number is given. Find out the wrong number?

3023, 3132, 3246, 3356, 3471

14, 16, 22, 46, 172, 886

Find the wrong number in the given number series.


11, 20, 38, 78, 154, 310

Find the wrong number in the given number series.

78, 66, 51, 39, 20, 12

Find the wrong number in the given number series.

2, 6, 24, 121, 720, 5040

Find the wrong number in the given number series.

4, 9, 19, 39, 69, 159

420, 380, 340, 300, 280, 220, 180

112, 130, 155, 196, 254, 342

139, 152, 172, 205, 249, 304

Find the wrong number in the given number series.

12, 16, 28, 48, 78, 112