Find out the wrong number in the given sequence of numbers.
1. 582, 605, 588, 611, 634, 617, 600
A. 634 B. 611
C. 605 D. 600
Answer: Option A
Explanation:
Alternatively 23 is added and 17 is subtracted from the terms. So, 634 is wrong.
2. 22, 33, 66, 99, 121, 279, 594
A. 33 B. 121
C. 279 D. 594
Answer: Option C
Explanation:
Each of the number except 279 is a multiple of 11.
3. 8, 13, 21, 32, 47, 63, 83
A. 47 B. 63
C. 32 D. 83
Answer: Option A
Explanation:
Go on adding 5, 8, 11, 14, 17, 20.
So, the number 47 is wrong and must be replaced by 46.
4. 1, 8, 27, 64, 124, 216, 343
A. 8 B. 27
C. 64 D. 124
Answer: Option D
Explanation:
The numbers are 13, 23, 33, 43 etc. So, 124 is wrong; it must have been 53 i.e., 125.
5. 1, 2, 6, 15, 31, 56, 91
A. 31 B. 91
C. 56 D. 15
Answer: Option B
Explanation:
1, 1 + 12 = 2, 2 + 22 = 6, 6 + 32 = 15, 15 + 42 = 31, 31 + 52 = 56, 56 + 62 = 92
1. 582, 605, 588, 611, 634, 617, 600
A. 634 B. 611
C. 605 D. 600
Answer: Option A
Explanation:
Alternatively 23 is added and 17 is subtracted from the terms. So, 634 is wrong.
2. 22, 33, 66, 99, 121, 279, 594
A. 33 B. 121
C. 279 D. 594
Answer: Option C
Explanation:
Each of the number except 279 is a multiple of 11.
3. 8, 13, 21, 32, 47, 63, 83
A. 47 B. 63
C. 32 D. 83
Answer: Option A
Explanation:
Go on adding 5, 8, 11, 14, 17, 20.
So, the number 47 is wrong and must be replaced by 46.
4. 1, 8, 27, 64, 124, 216, 343
A. 8 B. 27
C. 64 D. 124
Answer: Option D
Explanation:
The numbers are 13, 23, 33, 43 etc. So, 124 is wrong; it must have been 53 i.e., 125.
5. 1, 2, 6, 15, 31, 56, 91
A. 31 B. 91
C. 56 D. 15
Answer: Option B
Explanation:
1, 1 + 12 = 2, 2 + 22 = 6, 6 + 32 = 15, 15 + 42 = 31, 31 + 52 = 56, 56 + 62 = 92
Find out the wrong number in the given sequence of numbers.
6. 52, 51, 48, 43, 34, 27, 16
A. 27 B. 34
C. 43 D. 48
Answer: Option B
Explanation:
Subtract 1, 3, 5, 7, 9, 11 from successive numbers.
So, 34 is wrong.
7. 4, 6, 8, 9, 10, 11, 12
A. 10 B. 11
C. 12 D. 9
Answer: Option B
Explanation:
Each number is a composite number except 11.
8. 105, 85, 60, 30, 0, -45, -90
A. 0 B. 85
C. -45 D. 60
Answer: Option A
Explanation:
Subtract 20, 25, 30, 35, 40, 45 from successive numbers.
So, 0 is wrong.
9. 5, 16, 6, 16, 7, 16, 9
A. 9 B. 7
C. 6 D. None of these
Answer: Option A
Explanation:
Terms at odd places are 5, 6, 7, 8 etc. and each term at even place is 16.
So, 9 is wrong.
10. 125, 127, 130, 135, 142, 153, 165
A. 130 B. 142
C. 153 D. 165
Answer: Option D
Explanation:
Prime numbers 2, 3, 5, 7, 11, 13 are to be added successively.
So, 165 is wrong.
Find out the wrong number in the given sequence of numbers.
11. 46080, 3840, 384, 48, 24, 2, 1
A. 1 B. 2
C. 24 D. 384
Answer: Option C
Explanation:
The terms are successively divided by 12, 10, 8, 6, ...etc.
So, 24 is wrong, it should be 8 (48/6 = 8).
12. 6, 13, 18, 25, 30, 37, 40
A. 25 B. 30
C. 37 D. 40
Answer: Option D
Explanation:
The differences between two successive terms from the beginning are 7, 5, 7, 5, 7, 5.
So, 40 is wrong.
13. 36, 54, 18, 27, 9, 18.5, 4.5
A. 4.5 B. 18.5
C. 54 D. 18
Answer: Option B
Explanation:
The terms are alternatively multiplied by 1.5 and divided by 3. However, 18.5 does not satisfy it.
14. 56, 72, 90, 110, 132, 150
A. 72 B. 110
C. 132 D. 150
Answer: Option D
Explanation:
The numbers are 7 x 8, 8 x 9, 9 x 10, 10 x 11, 11 x 12, 12 x 13.
So, 150 is wrong.
15. 25, 36, 49, 81, 121, 169, 225
A. 36 B. 49
C. 121 D. 169
Answer: Option A
Explanation:
The numbers are squares of odd natural numbers, starting from 5 up to 15.
So, 36 is wrong.
6. 52, 51, 48, 43, 34, 27, 16
A. 27 B. 34
C. 43 D. 48
Answer: Option B
Explanation:
Subtract 1, 3, 5, 7, 9, 11 from successive numbers.
So, 34 is wrong.
7. 4, 6, 8, 9, 10, 11, 12
A. 10 B. 11
C. 12 D. 9
Answer: Option B
Explanation:
Each number is a composite number except 11.
8. 105, 85, 60, 30, 0, -45, -90
A. 0 B. 85
C. -45 D. 60
Answer: Option A
Explanation:
Subtract 20, 25, 30, 35, 40, 45 from successive numbers.
So, 0 is wrong.
9. 5, 16, 6, 16, 7, 16, 9
A. 9 B. 7
C. 6 D. None of these
Answer: Option A
Explanation:
Terms at odd places are 5, 6, 7, 8 etc. and each term at even place is 16.
So, 9 is wrong.
10. 125, 127, 130, 135, 142, 153, 165
A. 130 B. 142
C. 153 D. 165
Answer: Option D
Explanation:
Prime numbers 2, 3, 5, 7, 11, 13 are to be added successively.
So, 165 is wrong.
Find out the wrong number in the given sequence of numbers.
11. 46080, 3840, 384, 48, 24, 2, 1
A. 1 B. 2
C. 24 D. 384
Answer: Option C
Explanation:
The terms are successively divided by 12, 10, 8, 6, ...etc.
So, 24 is wrong, it should be 8 (48/6 = 8).
12. 6, 13, 18, 25, 30, 37, 40
A. 25 B. 30
C. 37 D. 40
Answer: Option D
Explanation:
The differences between two successive terms from the beginning are 7, 5, 7, 5, 7, 5.
So, 40 is wrong.
13. 36, 54, 18, 27, 9, 18.5, 4.5
A. 4.5 B. 18.5
C. 54 D. 18
Answer: Option B
Explanation:
The terms are alternatively multiplied by 1.5 and divided by 3. However, 18.5 does not satisfy it.
14. 56, 72, 90, 110, 132, 150
A. 72 B. 110
C. 132 D. 150
Answer: Option D
Explanation:
The numbers are 7 x 8, 8 x 9, 9 x 10, 10 x 11, 11 x 12, 12 x 13.
So, 150 is wrong.
15. 25, 36, 49, 81, 121, 169, 225
A. 36 B. 49
C. 121 D. 169
Answer: Option A
Explanation:
The numbers are squares of odd natural numbers, starting from 5 up to 15.
So, 36 is wrong.
