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:
39 comments Page 3 of 4.
Nandini said:
1 decade ago
Difference between 3, 7, 11 and 4, 8, 12 is same so the next no is 11+4=15.
Kavi kanyal said:
1 decade ago
2*1+1 = 3.
2*2 = 4.
2*3+1 = 7.
2*4 = 8.
2*5+1 = 11.
2*6 = 12.
2*7+1 = 15.
2*2 = 4.
2*3+1 = 7.
2*4 = 8.
2*5+1 = 11.
2*6 = 12.
2*7+1 = 15.
Samuel Fernandes said:
3 months ago
Alternate even numbers (4, 8, 12), alternate odd numbers (3, 7, 11, 15).
Bhavani said:
6 years ago
3 + 1 = 4,
4 + 3 = 7,
7 + 1 = 8,
8 + 3 = 11,
11 + 1 = 13,
12 + 3 = 15.
4 + 3 = 7,
7 + 1 = 8,
8 + 3 = 11,
11 + 1 = 13,
12 + 3 = 15.
(2)
Parimala said:
8 years ago
This sums odd numbers to +1 and even numbers to +3 we get the answer.
Ch.shravan kumar said:
1 decade ago
3+1=4;
4+3=7;
7+1=8;
8+3=11;
11+1=12;
12+3=15;
we use 1 and 3 add nos
4+3=7;
7+1=8;
8+3=11;
11+1=12;
12+3=15;
we use 1 and 3 add nos
K.sujitha said:
9 years ago
For alternative numbers we have to add 4 to get the next number.
Vrishank said:
9 years ago
The logic is, +1, +3, +1, +3, +1, +3, and you get the answer.
Pundrik Vinayak said:
1 decade ago
3 7 11 15 19 23....
4 8 12 16 20.........
4 8 12 16 20.........
G samuel said:
4 years ago
3+1 = 4,
4+3 = 7,
7+1 = 8,
8+3 = 11,
11+1 = 12
12+3 = 15.
4+3 = 7,
7+1 = 8,
8+3 = 11,
11+1 = 12
12+3 = 15.
(31)
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers