Problems on Numbers
Q21. Find out the worng term :
1946, 654, 218, 74, 26, 10
(a) 654
(b) 218
(c) 74
(d) 26
Answer: (a) 654
1946 + 4 | = | 1950 | = 650 |
3 | 3 |
650 + 4 | = | 654 | = 218 |
3 | 3 |
218 + 4 | = | 222 | = 74 |
3 | 3 |
74 + 4 | = | 78 | = 26 |
3 | 3 |
26 + 4 | = | 30 | = 10 |
3 | 3 |
So wrong term is = 654
Q22. Find out the worng term :
1, 3, 10, 21, 64, 129, 366, 777
(a) 64
(b) 129
(c) 366
(d) 777
Answer: (c) 366
1 X 2 + 1 = 3
3 X 3 + 1 = 10
10 X 2 + 1 = 21
21 X 3 + 1 = 64
64 X 2 + 1 = 129
129 X 3 + 1 = 388
388 X 2 + 1 = 777
So wrong term is = 366
Q23. Find out the worng term :
4116, 685, 136, 35, 10, 4
(a) 136
(b) 35
(c) 10
(d) 4
Answer: (b) 35
4116 - 6 | = | 4110 | = 685 |
6 | 6 |
685 - 5 | = | 680 | = 136 |
5 | 5 |
136 - 4 | = | 132 | = 33 |
4 | 4 |
33 - 3 | = | 30 | = 10 |
3 | 3 |
10 - 2 | = | 8 | = 4 |
2 | 2 |
So wrong term is = 35
Q24. Find out the worng term :
6, 27, 96, 285, 568, 567
(a) 27
(b) 96
(c) 285
(d) 568
Answer: (a) 27
6 X 5 - 5 = 30 - 5 = 25
24 X 4 - 4 = 100 - 4 = 96
96 X 3 - 3 = 288 - 3 = 285
285 X 2 - 2 = 570 - 2 = 568
568 X 1 - 1 = 568 - 1 = 567
So wrong term is = 27
Q25. Find out the worng term :
4, 11, 25, 46, 109, 221
(a) 25
(b) 46
(c) 109
(d) 221
Answer: (b) 46
4 X 2 + 3 = 8 + 3 = 11
11 X 2 + 3 = 22 + 3 = 25
25 X 2 + 3 = 50 + 3 = 53
53 X 2 + 3 = 106 + 3 = 109
109 X 2 + 3 = 218 + 3 = 221
So wrong term is = 46
Q26. Find out the worng term :
93, 309, 434, 498, 521, 533
(a) 309
(b) 434
(c) 498
(d) 521
Answer: (d) 521
93 + 63 = 93 + 216 = 309
309 + 53 = 309 + 125 = 434
434 + 43 = 434 + 64 = 498
498 + 33 = 498 + 27 = 525
525 + 23 = 525 + 8 = 533
So wrong term is = 521
Q27. Find out the worng term :
48, 30, 12, 3, 1
(a) 48
(b) 30
(c) 12
(d) 3
Answer: (b) 30
82 - 42 = 64 - 16 = 48
62 - 32 = 36 - 9 = 27
42 - 22 = 16 - 4 = 12
22 - 12 = 4 - 1 = 3
12 - 02 = 1 - 0 = 1
So wrong term is = 30
Q28. Find out the worng term :
2, 3, 4, 4, 6, 8, 9, 12, 16
(a) 6
(b) 8
(c) 9
(d) 12
Answer: (c) 9
1st Series : 2, 4, 9
2nd Series : 3, 6, 12
3rd Series : 4, 8, 16
In 1st series 9 is worng
Q29. Find out the worng term :
69, 55, 26, 13, 5
(a) 55
(b) 26
(c) 13
(d) 5
Answer: (d) 5
6 X 9 + 1 = 55
5 X 5 + 1 = 26
2 X 6 + 1 = 4
So the wrong term is 5
Q30. ?, 56, 36, 21, 11, 6
(a) 68
(b) 73
(c) 77
(d) 81
Answer: (d) 81
56 - 20 = 36
36 - 15 = 21
21 - 10 = 11
11 - 5 = 6
? = 56 + 25 = 81
Practice Test Exam