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:
129 comments Page 4 of 13.
Prachi said:
2 years ago
Very good and useful question. Thanks for posting.
(7)
Trezker said:
2 years ago
There is one thing here i want to mention where is 8.
if 8*1-2=6 so 8*0-1 =-1 but it doesn't match up.
and even i use 8*1-1 = 7 not 8.
if 8*1-2=6 so 8*0-1 =-1 but it doesn't match up.
and even i use 8*1-1 = 7 not 8.
(7)
Devesh kumar kashyap said:
2 years ago
Thank you all for your explanation.
(14)
Siva said:
2 years ago
Thanks, everyone, Good luck to all.
(5)
Tejeswani said:
2 years ago
Thanks everyone for giving explanation.
(9)
Nandini said:
2 years ago
@All.
Here is my explanation.
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.
Here is my explanation.
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.
(32)
Asha said:
3 years ago
Thank you everyone for explaining the answer.
(16)
Joana Castro said:
3 years ago
Good, Thanks, everyone.
(15)
Krishna Pratap Mahat Nepal said:
3 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.
(72)
Mathpati ashwini said:
4 years ago
Very helpful explanation, thank you so much.
(25)
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