Wrong Number series for SBI PO 2017
Directions: (1 – 10) Find
the wrong number in the series.
1. 96 98
202 618 2490
a) 202
b) 98
c) 618
d) 2490
e) 96
2. 122 126 152
277 902
a) 126
b) 122
c) 277
d) 152
e) 902
3. 176 308 464
644 856 1096
a) 308
b) 644
c) 464
d) 1096
e) 176
4. 184 142 122
110 106.5
a) 106.5
b) 142
c) 184
d) 122
e) 110
5. 72 153
388 1503 9567
a) 153
b) 72
c) 1503
d) 9597
e) 388
6.
90
132
132
181
182
240
a) 181
b) 182
c) 90
d) 240
e) 130
7.
9
18
91
61
341
a) 341
b) 61
c) 91
d) 18
e) None of these
8.
2
6
18
40
145 756
a) 756
b) 145
c) 2
d) 6
e) None of these
9.
4
6
13.5
46.56
230.66
a) 6
b) 46.56
c) 230.66
d) 4
e) None of these
10.
642
81
28
19 18
a) 642
b) 18
c) 81
d) 28
e) 19
Solutions:
1. D) 96×1+(1×2)=98;
98×2+(2×3)=202; 202×3+(3×4)=618; 618×4+(4×5)=2492≠2490
Hence 2490 is the wrong number
2. A) 122+51=127≠126; 127+52=152;
152+53=277; 277+54=902
Hence 126 is the wrong number
3. B) 176+(11×12)=308; 308+(12×13)=464; 464+(13×14)=646≠644;
646+(14×15)=856; 856+(15×16)=1096
Hence 644 is the wrong number
4. E) 184/2+50=142; 142/2+51=122; 122/2+50=111≠110;
111/2+51=106.5
Hence 110 is the wrong number
5. E) 72×2+91=153; 153×2+92=387≠388;
387×2+93=1503; 1503×2+94=9567
Hence 388 is the wrong number
6. A) 102-10=90; 112+11=132;
122-12=132; 132+13=182; 142-14=182; 152+15=240
Hence 181 is the wrong number
7. D) 23+13=9; 33-23=19;
43+33=91; 53-43=61; 63+53=341
Hence 18 is the wrong number
8. E) 1!+12=2; 2!+22=6;
3!+32=15; 4!+42=40; 5!+52=145; 6!+62=75
Hence 18 is the wrong number.
9. B) 4×1.5 = 6; 6×2.25= 13.5; 13.5×3.375 =
45.56; 45.56×5.0625 = 230.65
Hence 46.56 is the wrong number
10. D) 54+17=642; 43+17=81;
32+17=26; 21+17=19; 10+17=18
Hence 28 is the wrong number
