The digits in the number 5109238674 are interchanged in such a way that the 1st and 6th digits, the 2nd and 7th digits are interchanged, and so on for the rest of the digits. What will be the 3rd digit from the right in the rearranged number?

Refer to the following letter series and answer the question (counting from left to right): C B A S N U C O M D K I F J H A I P B E B H How many such consonants are there, each of which is immediately preceded by a consonant and also immediately followed by a consonant?

Refer to the given series and answer the question that follows (All numbers are single digit numbers only). Counting is to be done from left to right. (Left) 58561868515888941618425432126 (Right) How many such odd digits are there, each of which is immediately preceded by an even digit and also immediately followed by an even digit?