Logical Reasoning - Number Series - Discussion
Discussion Forum : Number Series - Type 1 (Q.No. 10)
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
10.
Look at this series: 31, 29, 24, 22, 17, ... What number should come next?
Answer: Option
Explanation:
This is a simple alternating subtraction series, which subtracts 2, then 5.
Discussion:
39 comments Page 3 of 4.
Sruthi said:
8 years ago
31-29=2.
29-24=5.
So diff are 2,5,2,5.
Hence 15 should be the answer to get a difference of 5.
29-24=5.
So diff are 2,5,2,5.
Hence 15 should be the answer to get a difference of 5.
Mohan said:
8 years ago
Here,
31-29=2.
29-24=5.
So the difference is 2,5,2,5.
So, next it should be 17-2=15 so it is the answer.
31-29=2.
29-24=5.
So the difference is 2,5,2,5.
So, next it should be 17-2=15 so it is the answer.
Prasanth.E said:
8 years ago
31,29,24,22,17.
Total series=5;
29+7=22
22+7=15.
So, the difference is odd=7, second number, fourth number is considered.
Total series=5;
29+7=22
22+7=15.
So, the difference is odd=7, second number, fourth number is considered.
Mohit said:
7 years ago
I thought it would work as the difference of 6.
31, 29,24,22,17.
Difference between :- 31-24:-6
29-22:-6
24-17:-6
Now next number in series would be 22-15:-6, therefore, 15 would be the answer.
31, 29,24,22,17.
Difference between :- 31-24:-6
29-22:-6
24-17:-6
Now next number in series would be 22-15:-6, therefore, 15 would be the answer.
Ishita said:
7 years ago
31-2 = 29
29-5 = 24
24-2 = 22
22-5 = 17
17-2 = 15.
15 is the answer.
29-5 = 24
24-2 = 22
22-5 = 17
17-2 = 15.
15 is the answer.
Pradeepkumar said:
7 years ago
31-2=29,
29-5=24,
24-2=22,
22-5=17,
17-2=15,
15 is the answer.
29-5=24,
24-2=22,
22-5=17,
17-2=15,
15 is the answer.
(1)
John JM said:
6 years ago
31-29=2.
29-24=5.
24-22=2.
17-12=5.
So the answer is 12.
29-24=5.
24-22=2.
17-12=5.
So the answer is 12.
(1)
Surya said:
6 years ago
2 is the difference of first two digits.
5 is the difference second and third digit.
So the series follows 2,5, 2,5,2...
17-2 = 15.
5 is the difference second and third digit.
So the series follows 2,5, 2,5,2...
17-2 = 15.
(1)
Sankaranarayanan said:
6 years ago
31-29=2,
29-24=5,
24-22=2,
22-17=5,
17-2=15.
29-24=5,
24-22=2,
22-17=5,
17-2=15.
(2)
Rizul said:
4 years ago
Difference of 2 in first two digits.
Then difference of 5 in second and third digits.
The series follows the pattern 2, 5, 2, 5, and so on.
Then difference of 5 in second and third digits.
The series follows the pattern 2, 5, 2, 5, and so on.
(2)
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