Number Series Questions

In the following question, select the missing number from the given series.

15, 7.5, 7.5, ?, 22.5, 56.25

What will come in place of the question mark (?) in the given question?

1.5 % of 4600 + 2.8% of 2000 - 109 = ?

In the following question, select the missing number from the given series.

3, 5, 7, 11, 13, ?

In the following question, select the missing number from the given series.

9, 13, 22, 38, 63, ?

Select the missing numbers from the given alternatives

8  21  4

27 ?   53

In the following question, select the missing number from the given series.

23, 23, 46, 138, 552, ?

In the following question, select the missing number from the given series.

1728, 864, 432, 216, ?

In the following question, select the missing number from the given series.

1, 2, 4, 7, 11, ?