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Logical Reasoning - Number Series - Discussion

Discussion Forum : Number Series - Type 1 (Q.No. 2)
Number Series
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
2.
Look at this series: 7, 10, 8, 11, 9, 12, ... What number should come next?
7
10
12
13
Answer: Option
Explanation:
This is a simple alternating addition and subtraction series. In the first pattern, 3 is added; in the second, 2 is subtracted.
Discussion:
110 comments Page 11 of 11.
Gaurav said:   1 decade ago
Somu is right
Juhi said:   1 decade ago
Thanks Somu.K great explain. Thanks. Friend.
Rohit.rcert said:   1 decade ago
It's obivously a alternate series of number in which numbers are changed by +3 and then -2 in A order.
and as praveen suggest A idea of breaking this chain into two sub chain of number....1st odd place number then 2nd even place number ant then each number of series is changed by +1 is a very nice shortcut...appriciate.
(1)
Jabin said:   1 decade ago
Correct.
Somu.k said:   1 decade ago
7+3=10
10-2=8
8+3=11
11-2=9
9+3=12
12-2=10

So, Answer is 10.

This is correct or not?
Harikrishnan said:   1 decade ago
It has the alternating series as 7, 8, 9 and 10, 11, 12. So the next series will be 10, 13. Like that.
Kasi said:   1 decade ago
I want more explanation about this with more examples example.
Rahul said:   1 decade ago
I want a solution of this one
(1)
Bharat said:   1 decade ago
One more thing every alternate number increase as 7, 8, 9, 10.
Praveen said:   2 decades ago
Add 1 to the odd positioned (7, 8, 9, 10) numbers, and add 1 to the even positioned numbers (10, 11, 12).
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