# 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
Anurag Mishra Professor Asked on 27th November 2015 in

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

Hence, the answer is (a) 140.

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.

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:-