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:
125 comments Page 8 of 13.
Princy said:
1 decade ago
In which way we can imagine the solution of such problem?
Shoeb said:
1 decade ago
Solve this if you are a master 99, 11, 88, __.
Shaunak said:
1 decade ago
It takes some time to solve, after practising it is easy now.
Thank you.
Thank you.
Anisha said:
1 decade ago
Thank you very much, it's very useful for me. Now I understand the method to solve the number series problems.
Kishore said:
1 decade 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:
1 decade 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:
1 decade 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:
1 decade ago
Can't understand this question please help?
Stephan said:
1 decade ago
8 + 6 + 9 = 23 threw me off. Didn't come up with the solution. By far the hardest in the collection.
VARUN said:
1 decade 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.
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