Logical Reasoning - Number Series - Discussion

Discussion Forum : Number Series - Type 1 (Q.No. 2)
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

2.
Look at this series: 7, 10, 8, 11, 9, 12, ... What number should come next?
7
10
12
13
Answer: Option
Explanation:
This is a simple alternating addition and subtraction series. In the first pattern, 3 is added; in the second, 2 is subtracted.
Discussion:
110 comments Page 6 of 11.

Srisai.putta said:   8 years ago
Just add & subtract the digits given in series 7, 10, 8, 11, 9, 12.

Ans:7+3=10, 10-2=8, 8+3=11, 11-2=9, 9+3=12, 12-2=10 :. Next coming number in the given series is 10.

Seema roy said:   8 years ago
How will we understand which numbers to be subtracted & added?

Please explain.
(1)

Madhavi said:   8 years ago
Nice explanation. Thanks.

Rajni gangwar said:   9 years ago
18, 1, 14, 9, ?, 12, 21.

What number should place at question mark?
(1)

Sumeet Kumar said:   9 years ago
Thanks for sharing good efforts.

Ajit singh said:   9 years ago
1th line : 7.8.9.
2th line 10.11.12.

Ans : 10.

Chetan said:   9 years ago
2, 3, 7, 17, 31, 53,.....

Find the next number please.
(2)

Kaderkhan said:   9 years ago
Please solve this 11, 22, 55, 165, ....

a. 495.5
b. 325.5
c. 577.5
d. 333.5
(4)

Jada dalei said:   9 years ago
Nice solution, Thank you all.

Jagabandhu jena said:   9 years ago
Yes, 10 is right answer.


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