Demographic dividend is related

If we remove all the letters from this series, then which of the following element will be 7th from left end? 

Vacuum Tubes were used in which generation of Computers?

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

Select the letter cluster that can replace the question mark (?) in the following series.

ZBKI, XDHM, VFEQ, THBU, ___?_____. PLVC

Study the following arrangements carefully and answer the questions.

% I 7 X 6 # 5 H O ^ J & 9 $ 1 N @ 6 L X ? 5 L * 8 ! 2 > 1 E

If all the symbols are replaced with the digit 3 from the given series then what is the sum of all the numbers given in the series?

Which element is exactly in the middle of third vowel from the left end and eighth symbol from the right end of the given arrangement?

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

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