Direction : Find the wrong term in the given series.
1
45     54     79     128     189     330     499
» Explain it
C
Series Pattern Given Series  
45 45
45 + 32 = 54 54
54 + 52 = 79 79
79 + 72 = 128 128
128 + 92 = 209 189
209 + 112 = 330 330
330 + 132 = 499 499

Hence, there should be 209 in place of 189. 

Hence, option C is correct.
2
4     16     5     625     6     1296     7     16807
» Explain it
D
Series Pattern Given Series  
41 4
42 = 16 16
51 = 5 5
53 = 125 625
61 = 6 6
64 = 1296 1296
71 = 7 7
75 = 16807 16807

Hence, there should be 125 in place of 625.

Hence, option D is correct.
3
9     10     19     58     231     1166    6935
» Explain it
B
Series Pattern Given Series  
9 9
9 × 1 + 1 = 10 10
10 × 2 – 1 = 19 19
19 × 3 + 1 = 58 58
58 × 4 – 1 = 231 231
231 × 5 + 1 = 1156 1166
1156 × 6 – 1 = 6935 6935

Hence, there should be 1156 in place of 1166.

Hence, option B is correct.

 
4
520     720     1025     1320     1740     2184   
» Explain it
A
Series Pattern Given Series  
(83 + 8) = 520 520
(93 – 9) = 720 720
(103 + 10) = 1010 1025
(113 – 11) = 1320 1320
(123 + 12) = 1740 1740
(133 – 13) = 2184 2184

Hence, there should be 1010 in place of 1025.

Hence, option A is correct.
 
5
256     252     240     228     192     156     112
» Explain it
E
Series Pattern Given Series  
256 256
256 – (4×1) = 252 252
252 – (4×3) = 240 240
240 – (4×5) = 220 228
220 – (4×7) = 192 192
192 – (4×9) = 156 156
156 – (4×11) = 112 112

Hence, there should be 220 in place of 228.

Hence, option E is correct.