Sol: Option 2 Explanation: There are three parallel series going on in this question. The 1st, 4th, 7th terms are using logic of -1, 2nd, 5th and 8th terms are using logic of +1 and 3rd, 6th and 9th terms are using logic of +1 again. Answer will be 11, which belongs to 1st, 4th and 7th term.
Sol: Option 1 Explanation:There are three parallel series going on in this question. The 1st, 4th, 7th terms are using logic of -1, 2nd, 5th and 8th terms are using logic of +1 and 3rd, 6th and 9th terms are using logic of +1 again. Answer will be 4, which belongs to 1st, 4th and 7th term.
1 3 2 6 3 11 4 18 5 ?
1. 27
2. 25
3. 23
4. 29
5. 20
Sol: Option 1 Explanation:
13 17 23 29 31 37 ??
1. 22
2. 41
3. 19
4. 23
5. 27
Sol: Option 2 Explanation: The given series is a prime number series. Hence the next prime number in this sequence would be 41.
17 16 14 12 11 8 8 ?
1. 4
2. 7
3. 3
4. 2
5. None of the above
Sol: Option 1 Explanation: There are two series:
Ist : 17 14 11 8 and 2nd: 16 12 8 ?
In first series, -3 , -3 ,-3….. and in 2nd series , -4 , -4 ,-4….
Therefore, next term will be 8 – 4 = 4.
Directions for questions 6-10: In each of the following number series only one number is wrong. Find out the wrong number.
3, 12, 8, 19, 13, 32, 18, 42, 23, 52
1. 12
2. 19
3. 42
4. 32
5. None of the above
Sol: Option 2 Explanation: The sequence is a combination of following two series:
I. 3, 8, 13, 18, 23 and II. 12, 19, 32, 42, 52
The pattern in I has a constant difference of +5, and the pattern in II has a constant difference of +10. So, in II, 19 is wrong and should be replaced by (12+10) i.e. 22
31, 2, 41, 3, 52, 4, 61, 5, 71, 6
1. 41
2. 61
3. 52
4. 31
5. 6
Sol: Option 3 Explanation: The sequence is a combination of two given series:
I. 31, 41, 52, 61, 71 and II. 2, 3, 4, 5, 6
So, the pattern in I is + 10
Thus, 52 is wrong and should be replaced by (41 + 10) i.e. 51.
10, 5, 19, 12, 39, 26, 73, 54
1. 5
2. 19
3. 39
4. 26
5. 54
Sol: Option 3 Explanation: The sequence is a combination of the following two series:
I. 10, 19, 39, 73, and II. 5, 12, 26, 54
The pattern in I becomes + 9, + 18, + 36, So 39 should be replaced by 37. So, 39 is wrong.
Sol: Option 2 Explanation: The given sequence is a combination of two series:
I. 1, 9, 25, 49 and II. 10, 16, 26
The pattern in I is +8, +16, +24.
The sequence in II is 32 + 1, 42 + 1, 52 + 1
So, 16 is wrong and must be replaced by (42 + 1) i.e. 17.
1, 125, 729, 2177
1. 2177
2. 729
3. 125
4. 1
5. 121
Sol: Option 1 Explanation: 1, 125, 729, 2177
1 = 13 , 125 = 53, 729 = 93. So, next number would be 133= 2197
Therefore, 2177 is wrong.