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?
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:
38 comments Page 2 of 4.
SUJIN.S said:
9 years ago
There is a simple logic.
3 + 1 = 4.
4 + 3 = 7.
7 + 1 = 8.
8 + 3 = 11.
11 + 1 = 12.
12 + 3 = 15.
This is the answer.
3 + 1 = 4.
4 + 3 = 7.
7 + 1 = 8.
8 + 3 = 11.
11 + 1 = 12.
12 + 3 = 15.
This is the answer.
Sam said:
1 year ago
3, 4, 7,8, 11, 12,?
Sorted from a list like 3, 7, 11.
Another 4, 8, 12.
Everywhere 4 is added.
Ans = 11 + 4=15.
Sorted from a list like 3, 7, 11.
Another 4, 8, 12.
Everywhere 4 is added.
Ans = 11 + 4=15.
(3)
Killer said:
2 years ago
3+4 = 7
7-4 = 3
8-7 = 1
11-8 = 3
21-11 = 1.
So sum up the numbers.
7 + 3 + 1 + 3 + 1 = 15.
7-4 = 3
8-7 = 1
11-8 = 3
21-11 = 1.
So sum up the numbers.
7 + 3 + 1 + 3 + 1 = 15.
(4)
Mahendra Thakur said:
1 decade ago
See odd numbers and add all odd numbers by 4 like.
3+4=7.
7+4=11.
11+4=15.
Answer is 15.
3+4=7.
7+4=11.
11+4=15.
Answer is 15.
Roshan Roy said:
9 years ago
The formula is +1 then +3 :
3+1=4.
4+3=7.
7+1=8.
8+3=11.
11+1=12.
Since 12+3=15.
3+1=4.
4+3=7.
7+1=8.
8+3=11.
11+1=12.
Since 12+3=15.
Javeeth said:
4 weeks ago
This simple:
3, 4 missing 5, 6.
7, 8 missing 9, 10.
11, 12 missing 13, 14.
15, 16.
3, 4 missing 5, 6.
7, 8 missing 9, 10.
11, 12 missing 13, 14.
15, 16.
(1)
Sagar said:
9 years ago
Can we do it like this,
3-4 = -1
4-7= -3
7-8 = -1
8-11 = -3
11-12 = -1
12-15 = -3
3-4 = -1
4-7= -3
7-8 = -1
8-11 = -3
11-12 = -1
12-15 = -3
Jagani said:
1 decade ago
3+1=4;
4+3=7;
7+1=8;
8+3=11;
11+1=12;
12+3=15;
Logic for add one and three.
4+3=7;
7+1=8;
8+3=11;
11+1=12;
12+3=15;
Logic for add one and three.
M.RAGHURAM PGDM 1 said:
9 years ago
Sequential number by adding 3 to next sequential number so the answer is 15.
Nandini said:
1 decade ago
Difference between 3, 7, 11 and 4, 8, 12 is same so the next no is 11+4=15.
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