Logical Reasoning - Number Series - Discussion
Discussion Forum : Number Series - Type 2 (Q.No. 1)
Directions to Solve
Look carefully for the pattern, and then choose which pair of numbers comes next.
1.
28 25 5 21 18 5 14
Answer: Option
Explanation:
This is an alternating subtraction series with the interpolation of a random number, 5, as every third number. In the subtraction series, 3 is subtracted, then 4, then 3, and so on.
Discussion:
129 comments Page 3 of 13.
Sarjon Basnet said:
1 year ago
Thanks a lot for explaining the answer.
(4)
Vaidik said:
11 months ago
@All.
Here, the First number will be 11 and the second number will be 7, need to check the options once again.
Correct me, If I am wrong.
Here, the First number will be 11 and the second number will be 7, need to check the options once again.
Correct me, If I am wrong.
(4)
Inapakurthi dinesh said:
10 months ago
@Hema.
Thanks for the clarification.
Thanks for the clarification.
(4)
Sommit said:
6 months ago
Thanks everyone for explaining the answer.
(4)
Sahasra said:
11 months ago
Anyone, give me a clear explanation to understand the answer?
(3)
Rohit T George said:
2 decades ago
@star007
That is quite simple.
INTERPOLATION here means simply including the number without logic.
28 25 5 21 18 5 14
Here 5 is used as a median you can say remove the 5's
28 25 (diff 3)
21 18 (diff 3)
14 ? (diff 3)( ?=11)
Then the next number is 5 because of interpolation.
That is quite simple.
INTERPOLATION here means simply including the number without logic.
28 25 5 21 18 5 14
Here 5 is used as a median you can say remove the 5's
28 25 (diff 3)
21 18 (diff 3)
14 ? (diff 3)( ?=11)
Then the next number is 5 because of interpolation.
(2)
CHAUDHARI SATISH said:
2 months ago
5 is random 11 & 5 is right Answer.
28-3 = 25 then 5.
25-4=21 then 5.
21-3= 18 then 5.
18-4= 14.
14-3= 11 then 5.
So, 28 25 5 21 18 5 14 11 5 this series.
28-3 = 25 then 5.
25-4=21 then 5.
21-3= 18 then 5.
18-4= 14.
14-3= 11 then 5.
So, 28 25 5 21 18 5 14 11 5 this series.
(2)
Raghavendra said:
2 decades ago
Please give the details of solution of this question because I cannot understand the your given clue.
(1)
Omkar said:
1 decade ago
That is quite simple.
INTERPOLATION here means simply including the number without logic.
28 25 5 21 18 5 14
Here 5 is used as a median you can say remove the 5's
28 25 (diff 3)
21 18 (diff 3)
14 ? (diff 3)( ?=11)
Then the next number is 5 because of interpolation.
28 (-3) 25 & 5
21 (-3) 18 & 5
14 (-3) 11 & 5
Ans (A) 11 5
INTERPOLATION here means simply including the number without logic.
28 25 5 21 18 5 14
Here 5 is used as a median you can say remove the 5's
28 25 (diff 3)
21 18 (diff 3)
14 ? (diff 3)( ?=11)
Then the next number is 5 because of interpolation.
28 (-3) 25 & 5
21 (-3) 18 & 5
14 (-3) 11 & 5
Ans (A) 11 5
(1)
AjayKumar said:
1 decade ago
Take first three number as one set. Then take second three number as another set. Here end number these two set is 5. So just leave. Then you have first set as 28 25.
Second set as 21 18.
Here the difference between First number from first set and first number from second set is 7.
Here third set first number is available as 14, then 18-7=11.
Add 5 as last number. Now answer is 14, 11, 5.
Second set as 21 18.
Here the difference between First number from first set and first number from second set is 7.
Here third set first number is available as 14, then 18-7=11.
Add 5 as last number. Now answer is 14, 11, 5.
(1)
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