Aptitude - Odd Man Out and Series - Discussion
Discussion Forum : Odd Man Out and Series - Odd Man Out (Q.No. 8)
Directions to Solve
Find the odd man out.
8.
2, 5, 10, 17, 26, 37, 50, 64
Answer: Option
Explanation:
(1*1)+1 , (2*2)+1 , (3*3)+1 , (4*4)+1 , (5*5)+1 , (6*6)+1 , (7*7)+1 , (8*8)+1
But, 64 is out of pattern.
Discussion:
48 comments Page 3 of 5.
Aniket said:
8 years ago
2, 10, 26, 50 are divisible by 2, where 5, 17, 37 are not divisible by 2.
MANJU BABAR said:
8 years ago
64 is a perfect square out of these numbers.
Nikhil Kumar said:
7 years ago
From my perspective;
For every two numbers if we observe the difference between the two numbers we are getting odd numbers like;
2-5=3,
5-10=5,
10-17=7,
17-26=9,
26-37=11,
37-50=13,
50-64=14(here the series is missing) after the difference '13' the next difference should be '17'.
These are in the form of odd number series.
For every two numbers if we observe the difference between the two numbers we are getting odd numbers like;
2-5=3,
5-10=5,
10-17=7,
17-26=9,
26-37=11,
37-50=13,
50-64=14(here the series is missing) after the difference '13' the next difference should be '17'.
These are in the form of odd number series.
Rjkomal said:
6 years ago
2+3 = 5.
5+5 = 10.
10+7 = 17.
17+9 = 26.
26+11 = 37.
37+13 = 50.
but 50+15 = 65.
Hence, 64 is odd in the series.
5+5 = 10.
10+7 = 17.
17+9 = 26.
26+11 = 37.
37+13 = 50.
but 50+15 = 65.
Hence, 64 is odd in the series.
Deepu said:
1 decade ago
The difference between the numbers are prime except between 50 and 64.
5-2=3.
10-5=5.
17-10=7.
26-17=9.
37-26=11.
50-37=13.
64-50=14.
3, 5, 7, 9, 11, 13 are prime numbers but 14 is not. So the answer is 64.
5-2=3.
10-5=5.
17-10=7.
26-17=9.
37-26=11.
50-37=13.
64-50=14.
3, 5, 7, 9, 11, 13 are prime numbers but 14 is not. So the answer is 64.
Vidhya said:
2 decades ago
also series that is obtained after subtracting evry proceeding no. from the previous increases by two
Ankita sood said:
1 decade ago
general term :
tn = t(n-1) + 2n-1 where n = 2,3,4,5...
t= 2
t1= 2 + 2(2)-1 = 5
t2= 5 + 2(3)-1 = 10
t3= 10 + 2(4)-1 = 17.... and so on where 64 is out of pattern
tn = t(n-1) + 2n-1 where n = 2,3,4,5...
t= 2
t1= 2 + 2(2)-1 = 5
t2= 5 + 2(3)-1 = 10
t3= 10 + 2(4)-1 = 17.... and so on where 64 is out of pattern
Vikram said:
1 decade ago
Here we can easily subtract the 2 numbers and the difference should be ordered by 3, 5, 7, 9, 11, 13, 15, 17. Like that'but the number 64 is exempted from this case.
Sourav Bhadra said:
1 decade ago
1+3=5
5+5=10
10+7=17
17+9=26
26+11=37
37+13=50
50+15=65 not 64...
(3-5-7-9-11-13-15) 64 is odd
5+5=10
10+7=17
17+9=26
26+11=37
37+13=50
50+15=65 not 64...
(3-5-7-9-11-13-15) 64 is odd
Teenu said:
1 decade ago
Each number must be added by preceeding odd number
0+2=2
2+3=5
5+5=10
10+7=17
17+9=26
26+11=37
37+13=50
50+15=65
Therefore 64 is odd
0+2=2
2+3=5
5+5=10
10+7=17
17+9=26
26+11=37
37+13=50
50+15=65
Therefore 64 is odd
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