Question for CAT Previous Year Questions: Number Series
Try yourself:318, 168, 78, 38, 18, 8, 3
Explanation
The solution is :
8/2 – 1 = 3
18/2 - 1 = 8
38/2 – 1 = 18
78/2 – 1 = 38
168/2 – 1 = 83 ≠ 78
318/2 -1 = 158 ≠ 168
Therefore, wrong no. is 168
Question for CAT Previous Year Questions: Number Series
Try yourself:3, 8, 18, 38, 80, 158, 318
Explanation
The solution is:
3 * 2 + 2 = 8
8 * 2 + 2 = 18
18 * 2 + 2 = 38
38 * 2 + 2 = 78 ≠ 80
78 * 2 + 2 = 158
158 * 2 + 2 = 318
Therefore, wrong no. is 80
Question for CAT Previous Year Questions: Number Series
Try yourself:120, 143, 168, 195, 226, 255
Explanation
(11)2 – 1 = 120
(12)2 – 1 = 143
(13)2 – 1 = 168
(14)2 – 1 = 195
(15)2 – 1 = 224 ≠ 226
(16)2 – 1 = 255
Question for CAT Previous Year Questions: Number Series
Try yourself:32, 39, 65, 128, 253, 467
Explanation
Therefore, wrong no. is 253
Question for CAT Previous Year Questions: Number Series
Try yourself:33, 39, 56, 85, 127, 185, 254
Explanation
Therefore, it must be 42+14 = 56 i.e. 127+56 = 183
56+ 15 = 71 i.e. 183+ 71 = 254
Hence, wrong no. is 185
Question for CAT Previous Year Questions: Number Series
Try yourself:7, 9, 21, 67, 275, 1371, 8233
Explanation
The solution is :
7 * 1 + 2 = 9
9 * 2 + 3 = 21
21 * 3 + 4 = 67
67 * 4 + 5 = 273 ≠ 275
273 * 5 + 6 = 1371
1371 * 6 + 7 = 8233
Therefore, wrong no. is 275
Question for CAT Previous Year Questions: Number Series
Try yourself:3, 6, 15, 45, 157, 630, 2835
Explanation
The solution is :
3 * 2 = 6
6 * 2.5 = 15
15 * 3 = 45
45 * 3.5 = 157.5 ≠ 157
157.5 * 4 = 630
630 * 4.5 = 2835
Therefore, wrong no. is 157
Question for CAT Previous Year Questions: Number Series
Try yourself:5, 23, 43, 66, 94, 131
Explanation
Because, difference of the difference is prime numbers in increasing order . therefore, wrong no. is 131
Question for CAT Previous Year Questions: Number Series
Try yourself:4, 2, 6, 0, 8, -4, 10
Explanation
Therefore, wrong no. is -4
Question for CAT Previous Year Questions: Number Series
Try yourself:2478, 819, 257, 84, 24, 5
Explanation
2478/3 – 7 = 819
819/3 – 6 = 267 ≠ 257
267/3 – 5 = 84
84/3 – 4 = 24
24/3 – 3 = 5
Therefore, the wrong no. is 257
Question for CAT Previous Year Questions: Number Series
Try yourself: 3, 11, 34, 69, 131, 223
Explanation
The solution is :
(1)3 + 2 = 3
(2)3 + 3 = 11
(3)3 + 4 = 31 ≠ 34
(4)3 + 5 = 69
(5)3 + 6 = 131
Therefore, the wrong no. is 34
Question for CAT Previous Year Questions: Number Series
Try yourself:9, 5, 9, 25, 95, 414
Explanation
The solution is :
9 * .5 + .5 = 5
5 * 1.5 + 1.5 = 9
9 * 2.5 + 2.5 = 25
25 * 3.5 + 3.5 = 91 ≠ 95
91 * 4.5 + 4.5 = 414
Therefore wrong no. is 95
Question for CAT Previous Year Questions: Number Series
Try yourself:8, 18, 64, 272, 1395, 8424, 59045
Explanation
Therefore, wrong no. is 64
Question for CAT Previous Year Questions: Number Series
Try yourself:47, 44, 45, 46, 33, 57, 3, 88
Explanation
Therefore, wrong no. is 57
Question for CAT Previous Year Questions: Number Series
Try yourself:1, 8, 66, 460, 2758, 13785, 55146
Explanation
The solution is :
1 * 9 – 1 = 8
8 * 8 + 2 = 66
66 * 7 - 3 =459 ≠ 460
459 * 6 + 4 = 2758
2758 * 5 – 5 = 13785
13785 * 4 + 6 = 55146
Therefore, wrong no. is 460
Question for CAT Previous Year Questions: Number Series
Try yourself:3, 7.5, 15, 37.5, 75, 167.5, 375
Explanation
The solution is :
3 * 2.5 = 7.5
15 * 2.5 = 37.5
75 * 2.5 = 187.5 ≠ 167.5
7.5 * 2 = 15
37.5 * 2 = 75
187.5 * 2 = 375
Therefore, wrong no. is 167.5
Question for CAT Previous Year Questions: Number Series
Try yourself:4, 12, 42, 196, 1005, 6066, 42511
Explanation
The solution is:
4 * 2 + (2)2 = 12
12 * 3 + (3)2 = 45 ≠ 42
45 * 4 + (4)2 = 196
196 * 5 + (5)2 = 1005
1005 * 6 + (6)2 = 6066
6066 * 7 +(7)2 = 2511
Therefore, wrong no. is 42
Question for CAT Previous Year Questions: Number Series
Try yourself:9, 7, 15, 44, 175, 874
Explanation
The solution is :
9 * 1 – 1 = 8 ≠ 7
8 * 2 – 1 = 15
15 * 3 – 1 = 44
44 * 4 – 1 = 175
175 * 5 – 1 = 874
Therefore, wrong no. is 7