Which encryption algorithm is commonly used for securing

What is the sum of all the odd numbers? 

If all the words are arranged according to the alphabetical series from right to left, then which word is third from the left end?

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

How many letters are there in the given series which are immediately followed by a number?

L 6 7 Z @ U 5 % 6 L M @ N P L 9 @ Y # 5 F 6

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 sequentially placed in the blanks of the given series will complete the series.

What is the sum of all the even numbers in the given series?

How many such symbols are there in the above series each of which is immediately followed by a number and also immediately preceded by a consonant?

How many such consonants are there in the above arrangement each of which is immediately followed by a consonant and also immediately preceded by a symbol?

________ is a commonly used graphic format for the Web.