3, 10, 27, 4, 16, 64, 5, 25, 125

The correct pattern is x 2 - 2.

So, 48 is wrong and must be replaced by (26 x 2 - 2) i.e. 50.

The correct pattern is + 1, + 4, + 9, + 16, + 25 i.e. + 1², + 2², + 3², + 4², + 5².

So, 22 is wrong and must be replaced by (16 + 4) i.e. 20.

The terms of the series are (l² - 0²), (2² - l²), (4² - 2²), (6² - 3²) and (8² - 4²).

So, 25 is wrong and must be replaced by (6² - 3²) i.e. 27.

Each term of the series is the product of the preceding two terms.

So, 5000 is wrong and must be replaced by (50 x 500) i.e. 25000.

The correct pattern is + 1, - 2, + 3, - 4, + 5.

So, 129 is wrong and must be replaced by (123 + 5) i.e. 128.

The terms of the given series are 1², (2² + 1), 3², (4²..+ 1), 5², (6² + 1), 7².

So, 15 is wrong and must be replaced by (4² + 1) i.e. 17.

The correct pattern is + 6, + 12, + 24, + 48, + 96, + 192.

So, 96 is wrong and must be replaced by (46 + 48) i.e. 94.

The correct pattern is x 6 - 6, x 5 - 5, x 4 - 4,.....

So, 24 is wrong and must be replaced by (6 x 5 - 5) i.e. 25.

The given sequence is a combination of two series:

I. 3, 8, 13, 18, 23 and II. 2, 9, 22, 32, 42

The pattern in I is + 5, and the pattern in II is + 10. So, in II, 9 is wrong and must be replaced by (2 + 10) i.e. 12.

The sequence is (14)², (13)², (12)², (11)², (10)².

So, 101 is wrong and must be replaced by (10)² i.e. 100.