Find the missing term in the series: $3, 22, ?, 673, 2696, 8093$.

$41 \quad 164 \quad 2624 \quad ? \quad 6045696$

$123 \quad 140 \quad 106 \quad 157 \quad 89 \quad ?$

If $A = \left(\frac{1}{0.4}\right) + \left(\frac{1}{0.04}\right) + \left(\frac{1}{0.004}\right) + \dots$ up to $8$ terms,then what is the value of $A$ (in $.5$)?

$3, 7, 15, ?, 63, 127$

Observe the following table and determine which number will come in place of $(d)$:

$1260$	$628$	$312$	$154$
$788$	$(a)$	$(b)$	$(c)$	$(d)$	$(e)$