$5, 54, 90, 115, 131, 140, ?$

Find the missing number in the series: $60, 20, ?, 15, 60, 12$.

What is the total marks obtained by $D$ in $Hindi$,$E$ in $Social Studies$,and $C$ in $Mathematics$ together?

Find the odd number from the given sequence: $4, 12, 42, 196, 1005, 6066, 42511$.

What is the value of $S = \frac{1}{1 \times 3 \times 5} + \frac{1}{1 \times 4} + \frac{1}{3 \times 5 \times 7} + \frac{1}{4 \times 7} + \frac{1}{5 \times 7 \times 9} + \frac{1}{7 \times 10} + \dots$ up to $20$ terms?

What will come in place of the question mark $(?)$ in the following number series?
$8, 27, 64, 125, 216, 343, ?$