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.
Karthik said:
5 years ago
16+16=32+1 = 33,
33+33=66-1 = 65,
65+65=130+1 = 131,
131+131=262-1 = 261,
261+261=522+1 = 523.
33+33=66-1 = 65,
65+65=130+1 = 131,
131+131=262-1 = 261,
261+261=522+1 = 523.
Supriya said:
4 years ago
16+16 = 32 + 1 = 33.
33+33 = 66 - 1 = 65.
65+65 = 130 + 1 = 131.
131+131 = 262 - 1 = 261.
261+261 = 522 + 1 = 523.
Hence 523 is the answer.
33+33 = 66 - 1 = 65.
65+65 = 130 + 1 = 131.
131+131 = 262 - 1 = 261.
261+261 = 522 + 1 = 523.
Hence 523 is the answer.
(7)
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