निम्नलिखित संख्या श्रृंखला में लुप्त संख्या ज्ञात कीजिए: 1, 2, 6, 24, 120, ?

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