निम्नलिखित श्रृंखला को देखें और प्रश्न का उत्तर दें। गणना केवल बाईं ओर से दाईं ओर की जानी है (सभी संख्याएँ केवल एकल अंक की संख्याएँ हैं)। (बायें) 6 5 1 4 5 7 6 7 4 3 9 6 3 5 8 7 6 8 4 9 7 4 4 2 (दायें) ऐसे कितने विषम अंक हैं जिनमें से प्रत्येक के ठीक पहले एक सम अंक है और ठीक बाद में एक पूर्ण वर्ग है?

Refer to the given number and symbol series and answer the question that follows. Counting is to be done from left to right only. All numbers are single-digit numbers. (Left) $ 9 $ 6 7 8 £ 5 1 8 2 £ 9 3 4 6 9 # 8 8 7 7 (Right) How many such numbers are there, each of which is immediately preceded by a symbol and also immediately followed by a symbol?

This question is based on the given words: DEN KIF BUN CAR In each of the words, each vowel is changed to the letter immediately following it in the English alphabetical order and each consonant is changed to the letter immediately preceding it in the English alphabetical order. In how many letter-clusters thus formed, will no vowel appear?