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:
110 comments Page 2 of 11.
Tejeswani said:
1 year ago
Thanks everyone for giving explanation.
(9)
Yedla Bhasker said:
7 months ago
Thanks all for explaining.
(9)
Harshit said:
3 years ago
Thanks everyone for explaining the answer.
(8)
Aanchalpulast said:
3 years ago
Thanks everyone for explaining it.
(8)
Khushi said:
8 months ago
Nice explanation, Thanks.
(8)
Trezker said:
10 months 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)
Prachi said:
8 months ago
Very good and useful question. Thanks for posting.
(7)
Equleus said:
4 years ago
@Stefy,
Although we can indeed use the logic of adding the 1st 2nd 3rd and then the 3rd 4th 5th, through this method there is no way to derive the 2nd number, and the others as well,
Generally, a sequence series has to be applied so that you can find n and n +1 using the same formula. You shouldn't have to need to use n, n+1, n+2 to find n+3.
Hope this Helped! (To all the others who chance across this forum as well).
Although we can indeed use the logic of adding the 1st 2nd 3rd and then the 3rd 4th 5th, through this method there is no way to derive the 2nd number, and the others as well,
Generally, a sequence series has to be applied so that you can find n and n +1 using the same formula. You shouldn't have to need to use n, n+1, n+2 to find n+3.
Hope this Helped! (To all the others who chance across this forum as well).
(5)
Siva said:
1 year ago
Thanks, everyone, Good luck to all.
(5)
Temesgen Eskezia said:
5 months ago
Thank you all for explaining the answer.
(5)
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