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.
Nandini said:
1 year 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.
(30)
Nirvan said:
7 years ago
A x B = AB - ( A + B ) = Y.
8 x 2 = 16 - 10 = 6,
6* 3 = 18 - 9 = 9,
9 * 4 = 36 - 13 = 23,
23* 5 = 115 - 28 = 87,
87*6 = 522 - 93 = 429.
8 x 2 = 16 - 10 = 6,
6* 3 = 18 - 9 = 9,
9 * 4 = 36 - 13 = 23,
23* 5 = 115 - 28 = 87,
87*6 = 522 - 93 = 429.
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)
Aruna said:
1 decade ago
When we saw that answer it looks like easy only but how we can recognize this is in this format it is like confusing question.
Sandeep said:
1 decade ago
It's so easy to understand first you all have to think which operation is going on the question then solve on the operation.
Settu M said:
1 decade ago
Definitely this is a conclusion question, how we can find out the multiple and subtract no. I don't want like this question.
Ramya said:
9 years ago
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, the answer is 429.
6 * 2 = 12 - 3 = 9
9 * 3 = 27 - 4 = 23
23 * 4 = 92 - 5 = 87
87 * 5 = 435 - 6 = 429
So, the answer is 429.
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.
Arun said:
1 decade ago
No one can predict what comes next, if the series is given like this and the rest of the questions are good but very easy.
Manoj tetwar said:
1 decade ago
No one can predict what comes next, if the series is given like this and the rest of the questions are good but very easy.
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