निम्नलिखित श्रृंखला में प्रश्न चिह्न (?) के स्थान पर कौन सी संख्या आएगी? 7, 7, 9, 27, 31, 155, ?

What should come in place of the question mark (?) in the given series? 4 10 22 46 94 ?

Find the missing number in the series given below: 25, 100, 400, 1600, ?

Find the missing term in the following number series: 2, 9, 28, ?, 126, 217, 344