The missing letter in the sequence Q, N, K, ?, E is –

The missing number in the sequence: 4, 18, 48, 100,?, 294, 448

The missing number in the series is: 4, 18, 48, ?, 180

The next term in the sequence 4, 10, 22, 46, ..... is -

In a letter series a _ _ bb _ a _ _ bbaacc _ _ a the missing letters in the proper order are

Next term in the following sequence is: 2, 12, 36, 80, 150, ?