## 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
Each number of series is the double of the preceding number. The missing number will be 4. 4.
2. 17, 7, 24, 19, 9, 28, ..., 8, 31 A.   20 B.   21 C.   18 D.   23
Solution
 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. 23.
3. 121, 112, ..., 97, 91, 86 A.   102 B.   108 C.   99 D.   104
Solution
Series is written in descending order with a difference of 9, 8 ,7, 6 and 5 respectively. Hence ,the missing number will be 104. 104.
4. 6, 7, 9, 13, 21, ... A.   25 B.   29 C.   37 D.   32
Solution
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. 37.
5. 2, 9, 28, 65, ... A.   126 B.   195 C.   121 D.   103
Solution
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. 126.
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