Aptitude - Odd Man Out and Series - Discussion
Discussion Forum : Odd Man Out and Series - Missing No. (Q.No. 7)
Directions to Solve
Insert the missing number.
7.
8, 24, 12, 36, 18, 54, (....)
Answer: Option
Explanation:
Numbers are alternatively multiplied by 3 and divided by 2.
So, the next number = 54 ÷ 2 = 27.
Discussion:
37 comments Page 1 of 4.
Abdur rehman said:
1 decade ago
It's so easy just see if 2nd digit comes in 1st digit table and then keep same series for other numbers. For example 24 comes in table of 8 so 8 into 3 will be 24. If we divide 24/2 then it will be 12. If 12 multiplied by 3 then it will be 36. 36 divide by 2 it will become 18. 18 multiplied by 3 will be 54. 54/2 will be 27. So answer will be 27.
Ashok said:
1 decade ago
8, 24, 12, 36, 18, 54, (....)
8*3=24, 8+4=12....by adding 4
12*3=36, 12+6=18...by adding 4+2=6
18*3=54, 18+9=27...by adding 6+3=9
...by adding 9+4=13 and so on.by increasing nos.like 2,3,4,5 and so on .
1st number*3=24
2nd number*3=36
3rd number*3=54
4th number*3=???
8*3=24, 8+4=12....by adding 4
12*3=36, 12+6=18...by adding 4+2=6
18*3=54, 18+9=27...by adding 6+3=9
...by adding 9+4=13 and so on.by increasing nos.like 2,3,4,5 and so on .
1st number*3=24
2nd number*3=36
3rd number*3=54
4th number*3=???
Sundar said:
1 decade ago
Hi Tarun
You are wrong. Then what about other numbers previous to 36 (8, 24, 12) ?
Let me explain in detail.
...
16 / 2 = 08
08 x 3 = 24
24 / 2 = 12
12 x 3 = 36
36 / 2 = 18
18 x 3 = 54
54 / 2 = 27 [The required answer]
27 x 3 = 81
...
I hope this will help you. Have a nice day!
You are wrong. Then what about other numbers previous to 36 (8, 24, 12) ?
Let me explain in detail.
...
16 / 2 = 08
08 x 3 = 24
24 / 2 = 12
12 x 3 = 36
36 / 2 = 18
18 x 3 = 54
54 / 2 = 27 [The required answer]
27 x 3 = 81
...
I hope this will help you. Have a nice day!
Rekha said:
11 months ago
8 9 17 26 90 ?
The difference between 8 and 9 is "1" which is 1^2.
The difference between 9 and 17 is "8" which is 2^3.
The difference between 17 and 26 is "9" which is 3^2.
The difference between 26 and 90 is "64" which is 4^3.
Then the answer is 5^2 which is "25".
The difference between 8 and 9 is "1" which is 1^2.
The difference between 9 and 17 is "8" which is 2^3.
The difference between 17 and 26 is "9" which is 3^2.
The difference between 26 and 90 is "64" which is 4^3.
Then the answer is 5^2 which is "25".
Nandha said:
1 decade ago
I have a suggestion. We can also add the 3rd and 5th numbers to get the previous numbers example.
8,24,12,36,18,54 - 8,24,12 = 12+12 = 24 to get 24 in the 1st series
then 36,18,54 = 18+18 to get 36 then 3rd series 27+27 = 54.
8,24,12,36,18,54 - 8,24,12 = 12+12 = 24 to get 24 in the 1st series
then 36,18,54 = 18+18 to get 36 then 3rd series 27+27 = 54.
Sowjanya said:
1 decade ago
It is difficult to find yar, to add alternate numbers and guess the other number and to add those number. It is very difficult. Nandha and explanation of Sundar was right. Good Explanation Sundar.
Ashutosh Pandey said:
8 years ago
@Mohit.
6 8 7
3 64 4
24 48 ?
42 will be answer
Be concentrated on first and last member.
6x2 = 12
12x3 =36
36-12= 24
8x2= 16
16x4= 64
64-16= 48
In same manner :
7*2= 14
14*4= 56
56*14 = 42
6 8 7
3 64 4
24 48 ?
42 will be answer
Be concentrated on first and last member.
6x2 = 12
12x3 =36
36-12= 24
8x2= 16
16x4= 64
64-16= 48
In same manner :
7*2= 14
14*4= 56
56*14 = 42
Towfiq said:
8 years ago
It's 30.
On each Row,
7mod(1st column +2nd column) = 7mod(3rd column),
For 1st row, 7 mod(6+8)=7 mod(7),
For 2nd row, 7 mod (3+64)=7 mod(4),
For 3rd row, 7 mod(24+48)=7 mod(30).
On each Row,
7mod(1st column +2nd column) = 7mod(3rd column),
For 1st row, 7 mod(6+8)=7 mod(7),
For 2nd row, 7 mod (3+64)=7 mod(4),
For 3rd row, 7 mod(24+48)=7 mod(30).
Vijay kumar sharma lnct bhopal said:
1 decade ago
Here the next term is twice the previous term like 24 is just twice of 12 and 36 just twice of 18 so 54 is just twice of 27 so answer is 27.
Koti said:
1 decade ago
We can take 2 series.
8, 12, 18, 26 with 4, 6, 8 differences.
24, 36, 54, 78 which is multiple of 3 for above terms?
8, 12, 18, 26 with 4, 6, 8 differences.
24, 36, 54, 78 which is multiple of 3 for above terms?
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