General Studies · Number Series

Refer to the given series and answer the question that follows (all numbers are single-digit numbers only, and all counting is to be done from left to right). (Left) 4 5 1 8 3 6 3 6 8 4 5 7 6 7 1 9 2 4 6 2 7 8 6 1 8 8 1 7 7 3 (Right) How many such even digits are there, each of which is immediately preceded by a perfect square and immediately followed by an even digit? (Note: 1 will be considered as a perfect square.)