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Directions (01-10):Â Find the wrong term in the following number series
1) 1, 13, 36, 85, 181, 373, 757
A.36
B.373
C.757
D.85
E.None of these
2) 9216, 2304, 576, 144, 36, 12
A.576
B.12
C.9216
D.144
E.None of these
3) 11, 22, 66, 130, 396, 792, 2376
A.396
B.130
C.2376
D.792
E.None of these
4) 675, 627, 580, 542, 509, 485, 472
A.580
B.509
C.627
D.485
E.None of these
5) 13, 20, 48, 112, 237, 453, 796
A.48
B.453
C.20
D.237
E.None of these
6) 85680, 10710, 1530, 255, 102, 12.75
A.12.75
B.255
C.1530
D.10710
E.102
7) 47, 240, 1446, 10120, 81040, 729369Â Â Â Â Â Â Â Â Â Â Â
A.240
B.1446
C.10120
D.47
E.81040
8) 49, 51, 55, 63, 77, 102
A.51
B.63
C.77
D.102
E.55
9) 3, 2, 8, 73, 1170, 29254
A.2
B.73
C.8
D.1170
E.29254
10) 19, 30, 53, 89, 139, 205Â Â Â Â Â Â Â Â Â
A.89
B.53
C.30
D.139
E.205
Answers :
1) Answer: A
1+12=13
13+24=37
37+48=85
85+96=181
181+192=373
373+384=757
Wrong number is 37
2) Answer: B
9216/4=2304
2304/4=576
576/4=144
144/4=36
36/4=9
Wrong number is 12
3) Answer: B
11*2=22
22*3=66
66*2=132
132*3=396
396*2=792
792*3=2376
Wrong number is 130
4) Answer: A
675-6*8=627
627-5*9=582
582-4*10=542
542-3*11=509
509-2*12=485
485-1*13=472
Wrong number is 580
5) Answer: C
13+23=21
21+33=48
48+43=112
112+53=237
237+63=453
Wrong number is 20
6) Answer: E
85680 ÷ 8 = 10710
10710 ÷ 7 = 1530
1530 ÷ 6 = 255
255 ÷ 5 = 51
51 ÷ 4 = 12.75
The wrong number is 102
7) Answer: C
47 * 5 + 5 = 240
240 * 6 + 6 = 1446
1446 * 7 + 7 =Â 10129
10129 * 8 + 8 = 81040
81040 * 9 + 9 = 729369
The wrong number is 10120
8) Answer: D
The wrong number is 102
9) Answer: E
3 * 12 + (– 1) = 2
2 * 22Â + 0 = 8
8 * 32Â + 1 = 73
73 * 42Â + 2 = 1170
1170 * 52Â + 3 =Â 29253
The wrong number is 29254
10) Answer: E
19Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 30Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 53Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 89Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 139Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 204
           11                   23                   36                   50                   65
                       12                   13                   14                   15
The wrong number is 205.
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