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:
126 comments Page 10 of 13.
Sagar said:
1 decade ago
28 25 5 21 18 5 14 11 5...
28-7=21.
25-7=18.
5 is common.
21-7=14.
18-7=11.
5 is common.
Than answer is 11 5.
28-7=21.
25-7=18.
5 is common.
21-7=14.
18-7=11.
5 is common.
Than answer is 11 5.
Rama said:
1 decade ago
I had easily understand this logic thank you for giving a simple explanation.
Birendra singh said:
1 decade ago
Now the answer 11, 5 because 28-25 = 3 21-18 = 3 14-3 = 11, 5.
Veeresh said:
1 decade ago
28 25 5 21 18 5 14
28-25 = 3 then
25-21 = 4 then
21-18 = 3 then
18-14 = 4 then
14-11 = 3 then answer is 11
One by one step we can minus by 3 and 4.
Answer: 28 25 5 21 18 5 14 11 5.
28-25 = 3 then
25-21 = 4 then
21-18 = 3 then
18-14 = 4 then
14-11 = 3 then answer is 11
One by one step we can minus by 3 and 4.
Answer: 28 25 5 21 18 5 14 11 5.
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)
Sarbjit said:
1 decade ago
28 (-3) 25 & 5.
21 (-3) 18 & 5.
14 (-3) 11 & 5.
21 (-3) 18 & 5.
14 (-3) 11 & 5.
Rohit vijay said:
1 decade ago
This can be breakdown in a group series of three number:
First series is 28......21.......14 (diff 7).
Second series is 25.....18.......11 (diff 7).
Third series is interpolation of a random number 5...5..5.
So answer is
28,25,5
21,18,5
14,11,5
. . .
First series is 28......21.......14 (diff 7).
Second series is 25.....18.......11 (diff 7).
Third series is interpolation of a random number 5...5..5.
So answer is
28,25,5
21,18,5
14,11,5
. . .
Sandip 5. 4 said:
1 decade ago
Nice logic.
28 25 5 21 18 5 14
28-25=3 then
25-21=4 then
21-18=3 then
18-14=4 then
14-11=3 then answer is 11
One by one step we can minus by 3 and 4
Answer: 28 25 5 21 18 5 14 11 5
28 25 5 21 18 5 14
28-25=3 then
25-21=4 then
21-18=3 then
18-14=4 then
14-11=3 then answer is 11
One by one step we can minus by 3 and 4
Answer: 28 25 5 21 18 5 14 11 5
Lovely said:
1 decade ago
28-3=25 then 5
21-3=18 then 5
14-3=11 then 5
so answer is 11 5..
21-3=18 then 5
14-3=11 then 5
so answer is 11 5..
Rashmi Kumari said:
1 decade ago
Difference of 1st and 4th number in series as 7,7,0 so put the value like that. So the next number in series are 11,5
28-21=7(1st no-4th no)
25-18=7(1st no-4th no)
5-5=0(1st no-4th no)
21-14=7(1st no-4th no)
18-11=7(1st no-4th no)
5-5=0(1st no-4th no)
28-21=7(1st no-4th no)
25-18=7(1st no-4th no)
5-5=0(1st no-4th no)
21-14=7(1st no-4th no)
18-11=7(1st no-4th no)
5-5=0(1st no-4th no)
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