दी गई श्रृंखला में ऐसे कितने 4 हैं जिनके ठीक पहले 7 है लेकिन ठीक बाद में 3 नहीं है? 5 9 3 2 1 7 4 2 6 9 7 4 6 1 3 2 8 7 4 1 3 8 3 2 5 6 7 4 3 9 5 8 2 0 1 8 7 4 6 3

Refer to the following series and answer the question (all numbers are single-digit numbers only, counting from left to right): (Left) 9 1 7 8 3 1 5 7 9 6 2 9 3 6 9 1 5 7 1 5 7 (Right) How many such even digits are there, each of which is immediately preceded by an even digit and also immediately followed by an odd digit?

Refer to the given number and symbol series and answer the question that follows (counting from left to right only): (Left) Ω 4 # * 7 8 ! 3 2 & % 1 9 6 3 @ 5 8 $ ^ (Right) How many such symbols are there, each of which is immediately preceded by a number and also immediately followed by another number?