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 7 of 12.
Shaunak said:
9 years ago
It takes some time to solve, after practising it is easy now.
Thank you.
Thank you.
Anisha said:
9 years ago
Thank you very much, it's very useful for me. Now I understand the method to solve the number series problems.
Kishore said:
9 years ago
@Arthi.
It is a sequence of cubes.
So,
1^3 = 1.
2^3 = 8.
3^3 = 27.
4^3 = 64 .
Therefore, the answer is 64.
It is a sequence of cubes.
So,
1^3 = 1.
2^3 = 8.
3^3 = 27.
4^3 = 64 .
Therefore, the answer is 64.
Arthi said:
9 years ago
Solve this 1, 8, 27, ?.
a) 37 b) 47 c) 51 d) 64
Here d) 64 is the right answer. How? Please explain anyone.
a) 37 b) 47 c) 51 d) 64
Here d) 64 is the right answer. How? Please explain anyone.
Goutam roy said:
10 years ago
Then where the 8 come from.
Here. 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.
Then what is the logic for "8".
6 is not the first number here. 8 is the first number.
Here. 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.
Then what is the logic for "8".
6 is not the first number here. 8 is the first number.
Devender said:
10 years ago
Can't understand this question please help?
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.
VARUN said:
10 years ago
Very easy:
8*1 = 8-2 = 6.
6*2 = 12-3 = 9.
9*3 = 27-4 = 23.
23*4 = 92-5 = 87.
87*5 = 435-6 = 429.
So answer is 429.
8*1 = 8-2 = 6.
6*2 = 12-3 = 9.
9*3 = 27-4 = 23.
23*4 = 92-5 = 87.
87*5 = 435-6 = 429.
So answer is 429.
Anu said:
10 years ago
Are there other questions like this on this site?
Aman said:
10 years ago
It was easy:
8x1-2 = 6.
6x2-3 = 9.
9x3-4 = 23.
23x4-5 = 87.
87x5-6 = 429.
It was easy question just think in other order.
8x1-2 = 6.
6x2-3 = 9.
9x3-4 = 23.
23x4-5 = 87.
87x5-6 = 429.
It was easy question just think in other order.
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