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 4 of 4.
Pichi viany said:
8 years ago
Nice explanations. Thanks all.
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)
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)
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)
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)
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)
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