एक निश्चित कूट भाषा में, 'TREF' को '3528' और 'KERF' को '5438' के रूप में कूटबद्ध किया जाता है। दी गई कूट भाषा में 'K' का कूट क्या है?

Each vowel in the word JUMBLED 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. How many vowels are there in the group of letters thus formed?

Each vowel in the word VARIETY 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. Which of the following letters will be second from the left in the newly formed word?