Question

120,80,40,45,_,5??????

Answer 1

40 I think by difference and in continue series

Answer 2

Answer:

The missing term is 25.

Step-by-step explanation:

The given series is ---  120, 80, 40, 45, x, 5.

Since, the series 120, 80, 40 is an alternating series with common difference $120-80=80-40=40$.

So, the continuing series -- 45, x, 5 should be an alternating series.

That is,

$45-x=x-5$

i.e. $2x=50$

i.e. x =25

So, we get the missing term is 25.