Logical Reasoning - Number Series - Discussion

Discussion Forum : Number Series - Type 1 (Q.No. 8)
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

8.
Look at this series: 3, 4, 7, 8, 11, 12, ... What number should come next?
7
10
14
15
Answer: Option
Explanation:
This alternating addition series begins with 3; then 1 is added to give 4; then 3 is added to give 7; then 1 is added, and so on.
Discussion:
42 comments Page 2 of 5.

Eshwar said:   8 years ago
Thanks for the logic @Shravan Kumar.
(1)

Kunal said:   8 years ago
Take alternate series 4,8,12.

Now .
4*2=8
4*3=12
4*4=16.

From here you can see every previous digit is 1 less then current digit according to the whole series.

So, the answer is 15.
(1)

Samuel Fernandes said:   11 months ago
Alternate even numbers (4, 8, 12), alternate odd numbers (3, 7, 11, 15).
(1)

Parimala said:   9 years ago
This sums odd numbers to +1 and even numbers to +3 we get the answer.

Vrishank said:   10 years ago
The logic is, +1, +3, +1, +3, +1, +3, and you get the answer.

Jhansi said:   10 years ago
As per my logic, we have to add 4 to alternate series.

K.sujitha said:   10 years ago
For alternative numbers we have to add 4 to get the next number.

Ruthvik said:   6 years ago
Thanks all for answering it.

Tanuj said:   4 months ago
Good question. Thanks.

Ram jangid said:   2 months ago
Very clear. Thanks all for explaining the answer.


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