Aptitude - Odd Man Out and Series - Discussion
Discussion Forum : Odd Man Out and Series - Missing No. (Q.No. 1)
Directions to Solve
Insert the missing number.
1.
16, 33, 65, 131, 261, (....)
Answer: Option
Explanation:
Each number is twice the preceding one with 1 added or subtracted alternatively.
So, the next number is (2 x 261 + 1) = 523.
Discussion:
12 comments Page 2 of 2.
Sou said:
1 decade ago
Adding and subtracting 1 alternatively
so
(2*16+1)=33
(2*33-1)=65
(2*65+1)=131
(2*131-1)=261
(2*261+1)=523
Therefore 523 is correct.
so
(2*16+1)=33
(2*33-1)=65
(2*65+1)=131
(2*131-1)=261
(2*261+1)=523
Therefore 523 is correct.
Fcd said:
1 decade ago
So that way I calculate the number 131*2+1=263 here I got 263 what's the correct answer?
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