Question

What will be the geometric mean of 'Q' and 'P - Q'.

Two number series 'l' and 'II' are given below. Both series have a missing term, if 'P' and 'Q' are natural numbers, then find their values and answer the questions based on it.
l. 13, 95, 218,  'P' , 619, 913
II. 108, 122, 143, 178,  (Q2 + 2)  , 304
A 50
B 20
C 65
D 75
E None of these
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