# Find Out the Wrong Series :

Directions (Q. no. 1-5)
Find out the wrong series

1. 140, 121, 100, 81, 64
(a) 140,                       (b) 121                     (c) 100                        (d) 81
2. 12, 16, 25, 41, 66, 104
(a) 16                          (b) 66                       (c) 104                        (d) 12
3. 256, 245, 223, 190, 146, 90
(a) 90                         (b) 146                      (c) 190                        (d) 223
4. Z5, X10, V29, T36, R69
(a) V29                      (b) T36                      (c) R69                       (d) Z5
5. UA, OC, IE, EJ, AO
(a) UA                       (b) OC                        (c) IE                          (d) EJ
1. Answer: (a) 140

Explanation:-
140 is not a square of any number but rest numbers are the square.

Hence, the answer is (a) 140.

2. Answer: (c) 104

Explanation:-
12 + (2)2 = 12 + 4= 16,
16 + (3)2 = 16 + 9
= 25,
25 + (4)2 = 25 + 16
= 41,
41 + (5)2 = 41 + 25
= 66,
Same,
66 + (6)2 = 66 + 36
= 102

Hence, the answer is (c) 104.

3. Answer: (a) 90

Explanation:-
256 – 1 x 11 = 256 – 11
= 245,
245 – 2 x 11 = 245 – 22
= 223,
223 – 3 x 11 = 223 – 33
= 190,
190 –  4 x 11 = 190 – 44
= 146,
146 – 5 x 11 = 146 – 55
= 91.

Then, the wrong term is 90.

Hence, the answer is (a) 90.

Explanation:-

5. Answer: (d) EJ

Explanation:-
A + 2 = C,  C + 2 = E,  E + 2 = G
But J is given in the series instead of J.

Hence, the answer is (d) E J.