# Target SBI PO Mains : Aptitude Day 7 : Number Series

1) 9827, 9706, 9606, 9520, 9461

a) 9520

b) 9606

c) 9706

d) 9461

e) 9827

a) 9520

9827-121=9706

9706-100=9606

9606-81=9525≠9520

9525-64=9461

2) 72, 153, 202, 228, 236

a) 202

b) 228

c) 153

d) 236

e) 72

b) 228

72+9^2=153

153+7^2=202

202+5^2=227≠228

227+3^2=236

3) 183, 545, 868, 1157, 1413

a) 1413

b) 1157

c) 868

d) 545

e) 183

d) 545

183+19^2=544≠545

544+18^2=868

868+17^2=1157

1157+16^2=1413

4) 16, 4.25, 2.625, 2.718, 3, 5.897

a) 16

b) 5.897

c) 3

d) 2.625

e) 4.25

c) 3

16×0.25+0.25=4.25

4.25×0.5+0.5=2.625

2.625×0.75+0.75=2.718

2.718×1+1=3.718≠3

3.718×1.25+1.25=5.897

5) 20, 36, 53, 74, 105

a) 53

b) 20

c) 74

d) 36

e) 105

c) 74

So the wrong number is 105.

6) 544, 624, 704, 792, 884, 984

a) 624

b) 704

c) 884

d) 984

e) 544

b) 704

So the wrong number is 704.

7) 1991, 1964, 1749, 1019, -709

a) 1964

b) 1749

c) 1019

d) 1991

e) -709

b) 1749

1991-3^3=1964

1964-6^3=1748≠1749

1748-9^3=1019

1019-12^3=-709

8) 29, 36, 62, 124, 249, 464

a) 249

b) 464

c) 124

d) 36

e) 29

c) 124

(29-1)+2^3=36

(36-1)+3^3=62

(62-1)+4^3=125≠124

(125-1)+5^3=249

(249-1)+6^3=464

9) 31, 40, 76, 158, 301, 526

a) 158

b) 301

c) 40

d) 526

e) 76

a) 158

31+(3×3)=40

40+(6×6)=76

76+(9×9)=157≠158

157+(12×12)=301

301+(15×15)=526

10) 42, 215, 1101, 5625, 28750

a) 215

b) 5625

c) 1101

d) 42

e) 28750