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:
49 comments Page 3 of 5.
Tonyo said:
10 years ago
2 + 3 = 5.
5 + 5 = 10.
10 + 7 = 17.
And so on.
5 + 5 = 10.
10 + 7 = 17.
And so on.
Ravi said:
10 years ago
Each number has difference of odd numbers 3, 5, 7, 9, 11, 13.
Aniket said:
9 years ago
2, 10, 26, 50 are divisible by 2, where 5, 17, 37 are not divisible by 2.
MANJU BABAR said:
9 years ago
64 is a perfect square out of these numbers.
Rjkomal said:
7 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:
2 decades 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:
2 decades 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:
2 decades 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
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