Problems on Numbers
Q31. 18, 28, 40, 54, 70, ?
(a) 79
(b) 88
(c) 93
(d) 97
Answer: (b) 88
18 + 10 = 28
28 + 12 = 40
40 + 14 = 54
54 + 16 = 70
70 + 18 = 88
? = 88
Q32. 120, 99, 80, 63, 48, 35, ?
(a) 24
(b) 25
(c) 26
(d) 27
Answer: (a) 24
120 - 21 = 99
99 - 19 = 80
80 - 17 = 63
63 - 15 = 48
48 - 13 = 35
35 - 11 = 24
Q33. 24, 28, ?, 52, 84
(a) 32
(b) 34
(c) 36
(d) 40
Answer: (c) 36
24 + 4 = 28
28 + 8 = 36
36 + 16 = 52
52 + 32 = 84
Q34. 4832, 5840, 6848, 7856, ?
(a) 7910
(b) 7915
(c) 8812
(d) 8864
Answer: (d) 8864
5840 - 4832 = 1008
6848 - 5840 = 1008
7856 - 6848 = 1008
? - 7856 = 1008
=> ? = 1008 + 7856 = 8864
Q35. 100, 200, 310, 430, ?
(a) 506
(b) 512
(c) 560
(d) 566
Answer: (c) 560
100 + 100 = 200
200 + 110 = 310
310 + 120 = 430
430 + 130 = 560
Q36. 34, ?, 14, 8, 2, 0
(a) 22
(b) 23
(c) 24
(d) 26
Answer: (c) 24
0 + 2 = 2
2 + 6 = 8
8 + 6 = 14
14 + 10 = 24
24 + 10 = 34
Q37. 33, 31, 36, ?, 39
(a) 34
(b) 35
(c) 36
(d) 37
Answer: (a) 34
33 - 2 = 31
31 + 5 = 36
36 - 2 = 34
34 + 5 = 39
Q38. 15, 41, 80, 132, ?
(a) 174
(b) 182
(c) 186
(d) 197
Answer: (d) 197
15 + 13 X 2 = 41
41 + 13 X 3 = 80
80 + 13 X 4 = 132
132 + 13 X 5 = 197
Q39. 344, 217, 126, ?, 28, 9, 2
(a) 39
(b) 59
(c) 60
(d) 62
Answer: (b) 59
344 217 126 ? 28 9 2
127 (344 - 217) 91 (217 - 126) ? ? 19 (28 - 9) 7 (9 - 2)
36 (127 - 91) ? ? ? 12 (19 - 7)
Missing term = 28 + 19 +12 = 59
Q39. 344, 217, 126, ?, 28, 9, 2
(a) 39
(b) 59
(c) 60
(d) 62
Answer: (b) 59
344 217 126 ? 28 9 2
127 (344 - 217) 91 (217 - 126) ? ? 19 (28 - 9) 7 (9 - 2)
36 (127 - 91) ? ? ? 12 (19 - 7)
Missing term = 28 + 19 +12 = 59
Q40. 5, ?, 25, 25, 125, 5, 625
(a) 25
(b) 625
(c) 95
(d) 125
Answer: (d) 125
1st Series : 625, 125, 25, 5
2nd Series : 5, 25, ?
In 1st Series : 5 X 5 = 25, 25 X 5 = 125, 125 X 5 = 625
In 2nd Series : 5 X 5 = 25, 25 X 5 = 125
∴ ? = 125
Practice Test Exam