Solution:
The given sequence is a combination of two series:I: Z, W, T, Q, ? and II: S, O, K, G,, ? The pattern in I is: Z - 3 = W - 3 = T - 3 = Q - 3 = N The pattern in II is : S - 4 = O - 4 = K - 4 = G - 4 = C

Solution:
The pattern is + 3, + 5, + 7, + 9, ..... So, missing term = 28 + 11 = 39.

Solution:
T - 2 = R - 2 = P - 2 = N - 2 = L - 2 = J - 2 = H

Solution:
B + 2 D + 2 F + 3 I + 3 L + 4 P + 4 T

Solution:
The pattern is + 8, + 10, + 12, + 14, ..... So, missing term = 70 + 18 = 88.

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

Solution:
The pattern is - 4, - 9, - 16,.....i.e. - 22, - 32, - 42,..... So, missing pattern = 169 - 52 = 169 - 25 = 144.