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 5 of 13.
Pradeep said:
1 decade ago
28+25+5 = 58.
21+18+5 = 44.
14+.... = ?
58-44 = 14.
Then 44-14 = 30;
So check ans 14+11+5 = 30.
21+18+5 = 44.
14+.... = ?
58-44 = 14.
Then 44-14 = 30;
So check ans 14+11+5 = 30.
Mattoo said:
1 decade ago
I looked at it as "28-25=3+2=5", then "21-18=3+2=5", then "14-11=3+2=5", and I arrived at the correct answer.
Uma said:
1 decade ago
28-21 = 7.
The first figure subtract from the first second set of figure after 5 and which also applies to the next set of figure. i.e the 1st subtracted from the first of the other set and second from the second.
25-18 = 7.
21-14 = 7.
18-7 = 11.
Then 5 is repeated.
The first figure subtract from the first second set of figure after 5 and which also applies to the next set of figure. i.e the 1st subtracted from the first of the other set and second from the second.
25-18 = 7.
21-14 = 7.
18-7 = 11.
Then 5 is repeated.
Harshit singh said:
1 decade ago
Its so simple. But logic is there.
De vender reddy said:
1 decade ago
Reasoning are very logical questions.
Vks said:
1 decade ago
Great logic.
Talwinder said:
1 decade ago
Show the mind intelligence.
Jatadhari sahoo said:
10 years ago
Its very simple question.
5 is common factor 2 number like:
28.....25....(5).
21.....18....(5).
14.....__....(5).
So 28---25 difference between them 3.
21---18.
= 21-18 = 3.
14 ? 11 - ? = 3 11, followed by 5.
Answer is 11.
5 is common factor 2 number like:
28.....25....(5).
21.....18....(5).
14.....__....(5).
So 28---25 difference between them 3.
21---18.
= 21-18 = 3.
14 ? 11 - ? = 3 11, followed by 5.
Answer is 11.
Vanaja said:
10 years ago
Nice explanation.
PALLAVI KRISHNA GOLLAPINNI said:
9 years ago
28 - 3 = 25 & 5
25 - 4 = 21 & 5
21 - 3 = 18 & 5
18 - 4 = 14 & 5
14 - 3 = 11 & 5
It is a simple logic.
25 - 4 = 21 & 5
21 - 3 = 18 & 5
18 - 4 = 14 & 5
14 - 3 = 11 & 5
It is a simple logic.
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