# APTITUDE : NUMBER SERIES SET – 102

D.1 – 5 ) Find the missing number in the following series.

1) 16, 40, 140, 630, 3465, ?

a) 25222.5

b) 22525.5

c) 22522.5

d) 22252.5

e) None of these

a) 25222.5

×2.5 ×3.5 ×4.5 ×5.5 ×6.5

2) 405, 270, 180, 120, ?

a) 40

b) 60

c) 80

d) 70

e) 90

c) 80

× 2/3 ×2/3 ×2/3 ×2/3 ×2/3

3) 15, 16, 20, 9, 25, 2, ?

a) 41

b) 49

c) 30

d) 31

e) 35

c) 30

There are two series 15, 20, 25 (difference 5) so next is 30

Another series is 16, 9, 2 (subtract 7)

4) 7, 15, 115, 142, 223, 287, ?

a) 351

b) 341

c) 799

d) 499

e) None of these

a) 351

+23 +102 +33 +92 +43 +82

5) 45, 51, 60, 75, 99, ?

a) 125

b) 140

c) 130

d) 135

e) 120

d) 135

+6 +9 +15 +24 +36

+3 +6 +9 +12

D.(6-10) What will come in place of question mark (?) in each of the following series?

6) 79 122 208 ? 509 724

a) 339

b) 387

c) 278

d) 316

e) 337

e) 337

The series is +43, +86, +129, +172, +215

7) 13 39 195 1365 ? 195195

a) 12285

b) 15015

c) 13145

d) 15235

e) None of these

b) 15015

The series is ×3, ×5, ×7, ×11, ×13

8) 18 13 32 20 46 ?

a) 29

b) 31

c) 27

d) 41

e) 35

c) 27 The series is ÷2+4, ×2+6, ÷2+4, ×2+6, ÷2+4

9) 347 468 ? 781 977 1202

a) 612

b) 637

c) 589

d) 578

e) None of these

a) 612 The series is +112, +122, +132, +142, +152

10) 147 316 595 994 1523 ?

a) 2345

b) 1987

c) 2145

d) 2192

e) None of these