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:
40 comments Page 1 of 4.
Balasubramanyamraju said:
4 years ago
31 - 2 = 29,
29 - 5 = 24,
24 - 2 = 22,
22 - 5 = 17,
17 - 2 = 15.
29 - 5 = 24,
24 - 2 = 22,
22 - 5 = 17,
17 - 2 = 15.
(18)
LUNA said:
2 years ago
So as per my analysis, the sequence of the numbers is;
31-29 = -2,
29-24 = -5,
24-22 = -2,
22-17 = -5,
17-15 = -2.
31-29 = -2,
29-24 = -5,
24-22 = -2,
22-17 = -5,
17-15 = -2.
(4)
Amrish said:
2 years ago
Thank you all for explaining the answer.
(4)
Shibo said:
2 years ago
I took just like this;
31 -24 = 7.
29-22 = 7.
So we had a common number 7 for the next series.
24 - 7 = 17.
22 - 7 = 15.
31 -24 = 7.
29-22 = 7.
So we had a common number 7 for the next series.
24 - 7 = 17.
22 - 7 = 15.
(4)
Rupesh Kumar Yadav said:
4 years ago
Here,
31-2 = 29,
29-5 = 24,
24-2 = 22,
22-5 = 17.
So, 17 - 2 = 15 => The Answer.
31-2 = 29,
29-5 = 24,
24-2 = 22,
22-5 = 17.
So, 17 - 2 = 15 => The Answer.
(3)
Neethu said:
1 year ago
50 - 13 = 40.
40 - 13 = 27.
27 - 13 = 14.
40 - 13 = 27.
27 - 13 = 14.
(2)
Guruvinoth said:
4 years ago
It's very useful. Thanks.
(2)
Jyotiranjan said:
4 years ago
31 - 2 = 29,
29 - 5 = 24,
24 - 2 = 22,
22 - 5 = 17,
17 - 2 = 15.
29 - 5 = 24,
24 - 2 = 22,
22 - 5 = 17,
17 - 2 = 15.
(2)
Rizul said:
5 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)
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)
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