Motion that repeats itself after some period of time, is

Select the related word/letters/number from the given alternatives.

BD : FH : : LN : (?)

In the given arrangement, which element is 5th to the left of 4th letter from the right end?

How many odd numbers are there in between the numbers which are eighth from the right end and seventh from the left end in the given series? 

Which of the following chips is powered by a battery?

How many 8’s are there in the above series which are immediately followed by a prime number?

Which element is exactly in the middle of the fourth consonant from the left end and sixth number from the right end?

Select the combination of letter that when sequentially placed in the blanks of the given series will complete the series.

A _ B C _ _ D B _ E _ D _ C __

What is the function of "LOOKUP"?

Consider the following number sequence:

4 3 4 5 7 3 9 3 5 7 5 4 7 8 9

In the given series, how many odd numbers are immediately preceded and immediately succeeded by an alphabet?