Arithmatical - Odd Man Out and Series
DIRECTIONS : Insert the missing number
1. |
2, ..., 8, 16, 32, 64, 128, 256 |
|
A. 6 |
B. 5 |
|
C. 4 |
D. 3 |
Solution |
4. |
Each number of series is the double of the preceding number. The missing number will be 4. |
|
2. |
17, 7, 24, 19, 9, 28, ..., 8, 31 |
|
A. 20 |
B. 21 |
|
C. 18 |
D. 23 |
Solution |
23. |
Each 3rd number is the sum of preceding two numbers.i.e .,17+7=24, 19+9=28, 23+8=31. Hence the missing number will be 23. |
|
3. |
121, 112, ..., 97, 91, 86 |
|
A. 102 |
B. 108 |
|
C. 99 |
D. 104 |
Solution |
104. |
Series is written in descending order with a difference of 9, 8 ,7, 6 and 5 respectively. Hence ,the missing number will be 104. |
|
4. |
6, 7, 9, 13, 21, ... |
|
A. 25 |
B. 29 |
|
C. 37 |
D. 32 |
Solution |
37. |
Series moves with a difference of 1, 2, 4, 8, 16. Hence the missing number will be 37. i.e., 6+1=7, 7+2=9, 9+4=13, 13+8=21, 21+16=37. |
|
5. |
2, 9, 28, 65, ... |
|
A. 126 |
B. 195 |
|
C. 121 |
D. 103 |
Solution |
126. |
Method used to from the series is :(1)³+1, (2)³+1,(3)³+1, (4)³+1 Therefore the missing number is (5)3 +1= 126. |
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