Problems on Numbers
Q11. 1, 4, 27, 16, ?, 36, 343
(a) 33
(b) 77
(c) 111
(d) 125
Answer: (d) 125
13 = 0
22 = 4
33 = 27
42 = 16
53 = 125
62 = 36
73 = 343
Q12.
1 | , | 3 | , | 5 | , | 7 | , | 9 | , ? |
2 | 4 | 8 | 16 | 32 |
(a) 8/13
(b) 11/25
(c) 11/64
(d) 12/74
Answer: (c) 11/64
1 | = | 1 |
2 | 2 |
1 + 2 | = | 3 |
22 | 4 |
3 + 2 | = | 5 |
23 | 8 |
5 + 2 | = | 7 |
24 | 16 |
7 + 2 | = | 9 |
25 | 32 |
9 + 2 | = | 11 |
26 | 64 |
Q13.
2 | , | 4 | , | 7 | , ?, | 16 |
3 | 7 | 13 | 31 |
(a) 11/21
(b) 12/13
(c) 8/13
(d) 15/17
Answer: (a) 11/21
2 + 2 | = | 4 |
3 + 4 | 7 |
4 + 3 | = | 7 |
7 + 6 | 13 |
7 + 4 | = | 11 |
13 + 8 | 21 |
11 + 5 | = | 16 |
21 + 10 | 31 |
Q14. 0, 4, 6, 3, 7, 9, 6, ?, 12
(a) 8
(b) 10
(c) 11
(d) 13
Answer: (b) 10
Series 1 :- 0, 3, 6
Series 2 :- 4, 7, ?
Series 3 :- 6, 9, 12
The pattern of each series is +3
∴ The required number is 7 + 3 = 10
Q15. 3, 20, 63, 144, 275, ?
(a) 376
(b) 398
(c) 422
(d) 468
Answer: (d) 468
Series 1 :- 3 20 63 144 275 ?
Series 2 :- 17 (20-3) 43 (63-20) 81 (144-63) 131 (275-144) ?
Series 3 :- 26 (43-17) 38 (81-43) 50 (131-81) ?
Series 4 :- 12 (38-26) 12 (50-38) ?
∴ Missing term = 275 + 131 + 50 + 12 (last term of each series)
=468
Q16. Find out the worng term :
380, 188, 92, 48, 20, 8, 2
(a) 188
(b) 92
(c) 48
(d) 20
Answer: (c) 48
380 - 192 = 188
188 - (192/2) = 188 -96 = 92
92 - (96/2) = 92-48 = 44
44 - (48/2) = 44 - 24 = 20
20 - (24/2) = 20 - 12 = 8
8 - (12/2) = 8 - 6 = 2
Worng term is = 48
Q17. Find out the worng term :
4, 10, 22, 46, 98, 190
(a) 10
(b) 22
(c) 46
(d) 98
Answer: (d) 98
4 + 6 = 10
10 + 12 = 22
22 + 24 = 46
46 + 48 = 94
94 + 96 = 190
Worng term is = 98
Q18. Find out the worng term :
94, 105, 127, 160, 202, 259, 325
(a) 127
(b) 160
(c) 202
(d) 259
Answer: (c) 202
94 + 11 = 105
105 + 22 = 127
127 + 33 = 160
160 + 44 = 204
204 + 55 = 259
259 + 66 = 325
Wrong term = 202
Q19. Find out the worng term :
24, 96, 386, 1536, 6144
(a) 24
(b) 96
(c) 386
(d) 1536
Answer: (c) 386
24 X 4 = 96
69 X 4 = 384
384 X 4 = 1536
1536 X 4 = 6144
Wrong term = 386
Q20. Find out the worng term :
196, 169, 144, 121, 102
(a) 169
(b) 144
(c) 121
(d) 102
Answer: (d) 102
142 = 196
132 = 169
122 = 144
112 = 121
102 = 100
Wrong term = 102
Practice Test Exam