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 1 of 5.
Srinithi said:
1 decade ago
The answer can be solved out in two ways:
1) The series is continued by first squaring the numbers from 1 and then next we have to add one the squared numbers and so on. By which 64 is the only number in the series written without adding 1 to it after squared.
2) We can also solve in the another way. Add the subsequent odd numbers from 3 to the given series but we find 65 is obtained in place of 65 by adding 15 to 50.
Therefore it can be judged that 64 is the odd man out.
1) The series is continued by first squaring the numbers from 1 and then next we have to add one the squared numbers and so on. By which 64 is the only number in the series written without adding 1 to it after squared.
2) We can also solve in the another way. Add the subsequent odd numbers from 3 to the given series but we find 65 is obtained in place of 65 by adding 15 to 50.
Therefore it can be judged that 64 is the odd man out.
Suneel varma bhupathi raju said:
9 years ago
In between 2and 5 there are two numbers i.e., 3, 4.
Similarly 5 and 10 there are four numbers i.e., 6, 7, 8, 9.
Between 10 and 17 there are six numbers i.e., 5, 11, 12, 13, 14, 15, 16.
Similarly, the order is increased like 2, 4, 6, 8, 10, 12, 14.
But the last two numbers 50 and 64 there are only 13 numbers.
So the answer is 64.
Similarly 5 and 10 there are four numbers i.e., 6, 7, 8, 9.
Between 10 and 17 there are six numbers i.e., 5, 11, 12, 13, 14, 15, 16.
Similarly, the order is increased like 2, 4, 6, 8, 10, 12, 14.
But the last two numbers 50 and 64 there are only 13 numbers.
So the answer is 64.
Manjukavi said:
1 decade ago
Mainly 2 methods.
1) 64 only a perfect square.
2) Difference between 2&5 is 3.
Difference between 5&10 is 5.
Difference between 10&17 is 7.
Difference between 17&26 is 9.
Difference between 26&37 is 11.
Difference between 37&50 is 13.
Difference between 50&64 is 14 (even).
So 64 is correct answer.
1) 64 only a perfect square.
2) Difference between 2&5 is 3.
Difference between 5&10 is 5.
Difference between 10&17 is 7.
Difference between 17&26 is 9.
Difference between 26&37 is 11.
Difference between 37&50 is 13.
Difference between 50&64 is 14 (even).
So 64 is correct answer.
Balu said:
10 years ago
Difference between 2 and 5 is 3, similarly difference 5 and 10 is 5.
Difference between 10 and 17 is 7, similarly difference between 17 and 26 is 9, difference between 26 and 37 is 11, difference between 37 and 50 is 13, difference between 50 and 64 is 14 (it is an odd one which have to ruled out).
So we have to add 3 5 7 11 13 15.
Difference between 10 and 17 is 7, similarly difference between 17 and 26 is 9, difference between 26 and 37 is 11, difference between 37 and 50 is 13, difference between 50 and 64 is 14 (it is an odd one which have to ruled out).
So we have to add 3 5 7 11 13 15.
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.
Vinod Saggam said:
1 decade ago
Its very simple just follow this, just go on subtracting.
2, 5, 10, 17, 26, 37, 50, 64.
5-2=3.
10-5=5.
17-10=7.
26-17=9.
37-26=11.
50-37=13.
But 64-50 is equal to 14. We have seen that the order is 3, 5, 7, 9, 11, 13.
All are odd numbers but 14 is an even number. So finally the answer is 64.
2, 5, 10, 17, 26, 37, 50, 64.
5-2=3.
10-5=5.
17-10=7.
26-17=9.
37-26=11.
50-37=13.
But 64-50 is equal to 14. We have seen that the order is 3, 5, 7, 9, 11, 13.
All are odd numbers but 14 is an even number. So finally the answer is 64.
Garima said:
1 decade ago
I don't understand questions like this.
If you see this question in another way then.
The logic is.
Add prime nos to get next no. Like:
2+3 = 5.
5+5 = 10.
10+7 = 17.
But 17+9 = 26 but 9 is not a prime no.
So the odd one is 26.
How to know what logic is to be applied.
If you see this question in another way then.
The logic is.
Add prime nos to get next no. Like:
2+3 = 5.
5+5 = 10.
10+7 = 17.
But 17+9 = 26 but 9 is not a prime no.
So the odd one is 26.
How to know what logic is to be applied.
Gurjot said:
1 decade ago
(2)2 - 2 = 2 i.e. [square of the no. and subtract 2 and so on..].
(3)2 - 4 = 5 So square the next no. and subtract the the no. by 4 now so on.
(4)2 - 6 = 10.
(5)2 - 8 = 17.
(6)2 - 10 = 26.
(7)2 - 12 = 37.
(8)2 - 14 = 50.
(9)2 - 16 = 65.
So the odd one is 64 (:
(3)2 - 4 = 5 So square the next no. and subtract the the no. by 4 now so on.
(4)2 - 6 = 10.
(5)2 - 8 = 17.
(6)2 - 10 = 26.
(7)2 - 12 = 37.
(8)2 - 14 = 50.
(9)2 - 16 = 65.
So the odd one is 64 (:
Raja said:
1 decade ago
Adding the odd numbers like,
sequentially,
2+3 = 5;
5+5 = 10;
10+7 = 17;
17+9 = 26;
26+11 = 37;
37+13 = 50;
Then finally this sequential pattern we get
50+15 = 65.
But there will be 64 is here.
So that's why 64 is oddman out.
sequentially,
2+3 = 5;
5+5 = 10;
10+7 = 17;
17+9 = 26;
26+11 = 37;
37+13 = 50;
Then finally this sequential pattern we get
50+15 = 65.
But there will be 64 is here.
So that's why 64 is oddman out.
Kalyan said:
6 years ago
2, 5, 10, 17, 26, 37, 50, 64.
The difference between two numbers
3 5 7 9 11 13 15.
3+2=5,
5+5=10, 7
+10=17,
9+17=26,
11+26=37,
13+37=50,
15+50=65.
According to this sequence, we get 65, so 64 is not matching.
The difference between two numbers
3 5 7 9 11 13 15.
3+2=5,
5+5=10, 7
+10=17,
9+17=26,
11+26=37,
13+37=50,
15+50=65.
According to this sequence, we get 65, so 64 is not matching.
(9)
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