Logical Reasoning - Number Series - Discussion
Discussion Forum : Number Series - Type 1 (Q.No. 19)
Directions to Solve
In each series, look for the degree and direction of change between the numbers. In other words, do the numbers increase or decrease, and by how much
19.
Look at this series: 8, 6, 9, 23, 87 , ... What number should come next?
Answer: Option
Explanation:
8 x 1 - 2 = 6
6 x 2 - 3 = 9
9 x 3 - 4 = 23
23 x 4 - 5 = 87
87 x 5 - 6 = 429 ...
Discussion:
122 comments Page 4 of 13.
Vinay Kumar said:
1 month ago
Please help me by explaining.
(2)
Varaprasad said:
1 decade ago
Only this question is thinkable one while compare to others.
(1)
Aayush said:
6 years ago
Solution : 8 x 1 - 2 = 6,
6 x 2 - 3 = 9,
9 x 3 - 4 = 23,
23 x 4 - 5 = 87,
87 x 5 - 6 = 429.
6 x 2 - 3 = 9,
9 x 3 - 4 = 23,
23 x 4 - 5 = 87,
87 x 5 - 6 = 429.
(1)
Akshara said:
5 years ago
You can understand this problem by understanding the relation between 9, 23 as shown in the solution 9'-3-4=23, and later you check the remaining numbers by using this method.
If it suitable for every number before 9 then you can do this with 87.
If it suitable for every number before 9 then you can do this with 87.
(1)
Prateek said:
5 years ago
Thanks @Akshara.
(1)
Loki said:
9 months ago
Nice explanation, Thanks all.
(1)
Iltja said:
8 months ago
Nice, very good for practice.
(1)
Shiva said:
7 months ago
Excellent. Thanks all for explaining.
(1)
Deepthi R said:
7 months ago
Great explanations, Thanks all.
(1)
Divya said:
1 decade ago
How any one come to know that this series will go like this?
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