$6, 18, 3, 21, 7, 56, ?$

$\frac{2}{3}, \quad \frac{4}{7}, \quad ?, \quad \frac{11}{21}, \quad \frac{16}{31}$

Find the wrong number in the series: $2, 5, 18, 19, 24, 29, 34$.

In the following number series,one of the numbers does not fit into the series. Mark the wrong number in the series.
$10 \quad 12 \quad 28 \quad 90 \quad 368 \quad 1840 \quad 1112$

$32, 49, 83, 151, 287, 559, ?$

$0$	$1$	$0$	$9$	$32$	$825$
$4$	$(A)$	$(B)$	$(C)$	$(D)$	$(E)$

What should come in place of $C$?