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:
113 comments Page 4 of 12.
Stephan said:
10 years ago
8 + 6 + 9 = 23 threw me off. Didn't come up with the solution. By far the hardest in the collection.
Krishna Pratap Mahat Nepal said:
2 years ago
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.
outcome * (n-1)-n.
6 x 2 - 3 = 9,
9 x 3 - 4 = 23,
23 x 4 - 5 = 87,
87 x 5 - 6 = 429.
outcome * (n-1)-n.
(69)
Aayush said:
5 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)
Aloj said:
9 years ago
8 * 1 = 8 - 2.
6 * 2 = 12 - 3.
9 * 3 = 27 - 4.
23 * 4 = 92 - 5.
87 * 5 = 435 - 6.
429 answer.
6 * 2 = 12 - 3.
9 * 3 = 27 - 4.
23 * 4 = 92 - 5.
87 * 5 = 435 - 6.
429 answer.
Kavya gupta said:
1 decade ago
But the is according to the question, confusing, I cannot understand what is given solution?
Gunjan said:
6 years ago
This is very easy to solve. Those who are basic learners in reasoning can easily solve it.
Sanjana said:
9 years ago
How to find the logic of the question, in which way we can solve this type of problems?
Sameer badoliya said:
1 decade ago
Its very simple according competitions because its can solve by 10 standard students.
Pavan said:
9 years ago
The above one is a little bit tough as compared to the other problems. Nice problem.
DHA said:
1 month ago
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)
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