दी गई श्रृंखला में कौन सी संख्या प्रश्न चिह्न (?) को प्रतिस्थापित करेगी? 17, 34, 31, ?, 119, 714

What should come in place of '?' in the given number series? 111, 110, 106, 97, 81, ?

Which of the given letter-number clusters will replace the question mark (?) in the following series to make it logically complete? NVA 7, KSX 14, HPU 21, EMR 28, ?