Logical Reasoning - Number Series - Discussion
Discussion Forum : Number Series - Type 2 (Q.No. 2)
Directions to Solve
Look carefully for the pattern, and then choose which pair of numbers comes next.
2.
8 11 21 15 18 21 22
Answer: Option
Explanation:
This is an alternating addition series, with a random number, 21, interpolated as every third number. The addition series alternates between adding 3 and adding 4. The number 21 appears after each number arrived at by adding 3.
Discussion:
66 comments Page 6 of 7.
Vipin said:
1 decade ago
Great job sundar.
Bharat said:
1 decade ago
Thanks Sundar.
Azhar said:
1 decade ago
Good explained by Sundar.
Priya said:
1 decade ago
Among all the above solution, I think Sundar is right.
Sundar said:
1 decade ago
8 11 [21] 15 18 [21] 22 25 [21] 29 32 [21] 36 39 [21] 43 46 [21] ....
Here 3, 4 is added alternatively and [21] injected as given below:
Inital = 8
8 + 3 = 11
********** [21]
11 + 4 = 15
15 + 3 = 18
********** [21]
18 + 4 = 22
22 + 3 = 25 <----- Required Answer
********** [21] <----- Required Answer
25 + 4 = 29
29 + 3 = 32
.........etc
Here 3, 4 is added alternatively and [21] injected as given below:
Inital = 8
8 + 3 = 11
********** [21]
11 + 4 = 15
15 + 3 = 18
********** [21]
18 + 4 = 22
22 + 3 = 25 <----- Required Answer
********** [21] <----- Required Answer
25 + 4 = 29
29 + 3 = 32
.........etc
Siva said:
1 decade ago
What is your confusion boss it is easy to get because hare to first number first 3 is added and then as third number interpolation would come and then what is there before interpolation number that would be added by 4 like this it will be go on.
Sameh said:
1 decade ago
I'm not convinced , if the answer was only 25 it would be ok but 25 21 is confusing..
Prathyusha said:
1 decade ago
11-8=3
15-18=3
22-25=3
so 25 21 is answer
15-18=3
22-25=3
so 25 21 is answer
(1)
G.priyanga said:
1 decade ago
I did not get this answer. Please explain it clearly.
Sriharsha said:
1 decade ago
What is interpolation?
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