निम्नलिखित श्रृंखला को देखिए और प्रश्न का उत्तर दीजिए (सभी संख्याएँ केवल एकल अंक की संख्याएँ हैं)। गणना केवल बाएँ से दाएँ की जानी है। (बाएँ) 5 7 9 4 2 1 4 7 9 3 2 6 8 5 4 1 9 5 4 3 2 (दाएँ) ऐसे कितने सम अंक हैं जिनमें से प्रत्येक के ठीक पहले एक सम अंक है और ठीक बाद में भी एक सम अंक है?

Refer to the following letter series and answer the question. (Counting is to be done from left to right only). (Left) Z M L Q B X K C H A W V N T R Y D F J P I A U K E O X Z (Right) How many such vowels are there, each of which is immediately preceded by a vowel and immediately followed by a vowel?

Refer to the following number and symbol series and answer the question. Counting is to be done from left to right only. (All numbers are single-digit numbers only). (Left) 2 ^ 7 ? $ % < ? 4 3 \ & * @ # < 6 7 + 3 # (Right) How many such numbers are there, each of which is immediately preceded by a symbol and also immediately followed by a symbol?