Aptitude - Odd Man Out and Series - Discussion
Discussion Forum : Odd Man Out and Series - Pick Wrong No. (Q.No. 13)
Directions to Solve
Find out the wrong number in the given sequence of numbers.
13.
36, 54, 18, 27, 9, 18.5, 4.5
Answer: Option
Explanation:
The terms are alternatively multiplied by 1.5 and divided by 3. However, 18.5 does not satisfy it.
Discussion:
37 comments Page 1 of 4.
Turubilli Hema lata said:
4 years ago
Solution:
36-->3+6 = 9
54-->5+4 = 9
18-->1+8 = 9
27-->2+7 = 9
9 will write as 09-->0+9 = 9
18.5--->1+8+5 = 14
4.5-->4+5 = 9.
All are divisible by 3 except 18.5 so answer is 18.5(B).
36-->3+6 = 9
54-->5+4 = 9
18-->1+8 = 9
27-->2+7 = 9
9 will write as 09-->0+9 = 9
18.5--->1+8+5 = 14
4.5-->4+5 = 9.
All are divisible by 3 except 18.5 so answer is 18.5(B).
(33)
Sudhakar KR said:
7 years ago
We may solve in another method tooo.
Consider odd series 36,18,9,4.5 (÷2).
Consider even series 54,27,13.5(÷2).
Wrong one is 18.5.
Consider odd series 36,18,9,4.5 (÷2).
Consider even series 54,27,13.5(÷2).
Wrong one is 18.5.
(3)
Abi said:
4 years ago
No @Udhaya.
54 - 36 = 18,
27 - 18 = 9.
18.5 - 9 is not equal to 4.5.
So he said 18.5 is wrong.
My opinion is why we change 18.5, we also change 9..So 9 is also wrong.
54 - 36 = 18,
27 - 18 = 9.
18.5 - 9 is not equal to 4.5.
So he said 18.5 is wrong.
My opinion is why we change 18.5, we also change 9..So 9 is also wrong.
(2)
Mohammed abu aslam said:
8 years ago
All the numbers in the table are multiples of 4.5 i.e( all the terms in the table satisfy the table of 4.5 except 18.5).
Hence the answer is 18.5.
Hence the answer is 18.5.
(2)
Elakkiya said:
7 years ago
@All.
In my view,
I took the alternate numbers in one series.
4.5,9,18,36.
4.5*2=9*2=18*2=36,
13.5*2=27*2=54,
So 18.5 is wrong I think.
In my view,
I took the alternate numbers in one series.
4.5,9,18,36.
4.5*2=9*2=18*2=36,
13.5*2=27*2=54,
So 18.5 is wrong I think.
(2)
Harsh said:
7 years ago
Numbers are 36, 54, 18, 27, 9, 18.5, 4.5.
4.5+4.5=9,
18.5+18.5=37,
9+9=18,
27+27=54,
18+18=36,
Here, only the addition of 18.5 is not obtained. So, the answer is B.
4.5+4.5=9,
18.5+18.5=37,
9+9=18,
27+27=54,
18+18=36,
Here, only the addition of 18.5 is not obtained. So, the answer is B.
(2)
Mandal said:
6 years ago
The simplest way is for all the numbers the sum of all the digits is 9 (36 is 3+6=9, 54 is 5+4=9, 27 is 2+7=9, 9 is 9, 4.5 is 4+5=9).
But for 18.5 its 1+8+5=14 and thus not equal to 9.
I am not sure if its a correct solution or not but this is the way that I could think of.
But for 18.5 its 1+8+5=14 and thus not equal to 9.
I am not sure if its a correct solution or not but this is the way that I could think of.
(1)
Anjali Mittal said:
8 years ago
1 and 2 number is the multiple of 3rd number and so on, but 18. 5 doesn't satisfy this condition i.e (18, 18*2=36, 18*3=54) (9, 9*2=18, 9*3=27) (4.5, 4.5*2=9, 4. 5*3=13.5). There should be 13.5 instead of 18.5.
(1)
Pichi viany said:
8 years ago
Nice explanations. Thanks all.
Prem malde said:
8 years ago
18.5 cannot be divided by 9 while others can be divided by 9.
So answer is 18.5.
So answer is 18.5.
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