2, 5, 10, 50, 500, 5000

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 series are (1² + 1), (2² + 1), (3² + 1), (4² + 1), (5² + 1), (6² + 1),

(7²+1),.....

So, 64 is wrong and must be replaced by (8² + 1) i.e. 65.

The correct pattern is - 20, - 25, - 30,.....

So, 0 is wrong and must be replaced by (30 - 35) i.e. - 5.

The correct pattern is x 1 + 1, x 2 + 2, x 3 + 3, x 4 + 4,.....

So, 32 is wrong and must be replaced by (10 x 3 + 3) i.e. 33.

Each term of the series is obtained by multiplying the preceding term by 2.

So, 96 is wrong and must be replaced by (64 x 2) i.e. 128.

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.

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 correct pattern is x 2 - 2.

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

The correct sequence is 3, 3², 3³, 4, 4², 4³, 5, 5², 5³.

So, 10 is wrong and must be replaced by 3² i.e. 9.

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.