Solution:
The pattern is +6, +9, +12, +15...............So, missing term=21+12=33

Solution:
The sequence is (14)2 , (13)2 , (12)2 , (11)2 , (10)2 ..........So, 101 is wrong and must be replaced by (10)2 i.e., 100

Solution:
This is a simple addition series, which begins with 2 and adds 6.

Solution:
This is an alternating addition series that adds 5, then 2, then 5, and so on.

Solution:
Solution 1: Each number of given series is 15 multiplied by a prime number. 15*11, 15*13, 15*17, 15*19, 15*23. So, Missing number is 15*29 = 435. Solution 2: This pattern is +30 and then +60 also follow for the give series. 165+30=195, 195+60=255, 255+30=285, 285+60=345, 345+30=375

Solution:
The correct pattern is ×6 -6, ×5 -5, ×4 -4, ×3 -3, . . . . . So, 24 is wrong and must be replaced by (6 × 5 - 5) i.e., 25

Solution:
The pattern is - 66, - 55, - 44, -33, - 22,............... So, missing term = 105 - 11 = 94