Find the missing number.

$8, 12, 10, 16, 12,?$

Find the missing number.

$7, 9, 12, 14, 17, 19,?$

Find the wrong number.

$10,18, 24, 34, 42, 50$

Find the wrong number.

$4 , 6 , 9 , 14 , 16$.

Find the wrong number.

$17, 19, 16, 18, 15$

Find the wrong number.

$7, 15, 32, 68, 138, 281$

Find the wrong number.

$4, 9, 16, 25, 34$

What will come in place of ? in the given series.

$F-1, G-3, J-5, 0-8,?$

What will come at the place of the question mark?

$\mathrm{D}-4, \mathrm{G}-7, \mathrm{I}-9, \mathrm{M}-13,?$