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?
15
14
13
12
Answer: Option
Explanation:
This is a simple alternating subtraction series, which subtracts 2, then 5.
Discussion:
39 comments Page 3 of 4.

ANTHONI NARESH said:   1 decade ago
I said that.

31-2=29.
29-5=24.
24-2=22.
22-5=17.
17-2=15.

Answer is 15.

Ishita said:   7 years ago
31-2 = 29
29-5 = 24
24-2 = 22
22-5 = 17
17-2 = 15.

15 is the answer.

Jyotiranjan said:   4 years ago
31 - 2 = 29,
29 - 5 = 24,
24 - 2 = 22,
22 - 5 = 17,
17 - 2 = 15.
(2)

Balasubramanyamraju said:   3 years ago
31 - 2 = 29,
29 - 5 = 24,
24 - 2 = 22,
22 - 5 = 17,
17 - 2 = 15.
(16)

Jagani said:   1 decade ago
Dear friends.

31-2=29;
29-24=5;
17-15=2;

Subtract 2 & 5.

Pradeepkumar said:   7 years ago
31-2=29,
29-5=24,
24-2=22,
22-5=17,
17-2=15,
15 is the answer.
(1)

Jagani said:   1 decade ago
Dear friends.

31-2=29;
29-24=5;
17-15=2;

Subtract 2 & 5.

Jagani said:   1 decade ago
Dear friends.

31-2=29;
29-24=5;
17-15=2;

Subtract 2 & 5.

M.RAGHURAM PGDM 1 said:   9 years ago
Taking difference 2 and 5 alternatively. So the answer is 15.

K.sujitha said:   9 years ago
Subtract the alternative numbers with 7, then 22 - 7 = 15.


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