The saint prayed that God might pour all his blessings

If 4     x       4           7          15        38.5

Then,  ( x  + 1) ( x  - 1) = ?

32       54       98       186       ?       714

3 4.5 6.75 10.125 15.1875 22.78125 ?

Direction: Which of the following will replace ‘?’ in the given question?

5, 18, ‘?’, 126, 296, 586, 1044

1. In series II, if ‘x’ is the right term, then find which of the following statement(s) are true.

I. x/124 is a factor 6 and 8.

11    33    66    112    173      ?    .  

14, 28, 54, 98, 154, 224

84, 61, 80, 57, 76, ?

35       57       101       189       ?       717