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?
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:
105 comments Page 6 of 11.
Ajit singh said:
8 years ago
1th line : 7.8.9.
2th line 10.11.12.
Ans : 10.
2th line 10.11.12.
Ans : 10.
Chetan said:
8 years ago
2, 3, 7, 17, 31, 53,.....
Find the next number please.
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
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.
Srimathi said:
9 years ago
It's a very simple.
7, 10, 8, 11, 9, 12, ...
Divide in to two parts.
1st -> 7 8 9.
2nd -> 10 11 12.
So the next number would be 10.
7, 10, 8, 11, 9, 12, ...
Divide in to two parts.
1st -> 7 8 9.
2nd -> 10 11 12.
So the next number would be 10.
Navadurga said:
9 years ago
Here,
7 + 3 = 10,
10 - 2 = 8,
8 + 3 = 11,
11 - 2 = 9,
9 + 3 = 12,
12 - 2 = 10 according to this B is correct answer.
7 + 3 = 10,
10 - 2 = 8,
8 + 3 = 11,
11 - 2 = 9,
9 + 3 = 12,
12 - 2 = 10 according to this B is correct answer.
Sedhumadhavan said:
9 years ago
First we find difference between each two numbers.
Then that comes,
7, 10 - 2 numbers is difference.
10, 8 - (-1) number is difference.
8, 11 - 2 number is difference.
11, 9 - (-1) number is difference.
9, 12 - 2 number is difference.
Next number is see before the series is 2, -1, 2, -1, 2.
Then finally we consider difference is -1. So, the answer is 10.
Then that comes,
7, 10 - 2 numbers is difference.
10, 8 - (-1) number is difference.
8, 11 - 2 number is difference.
11, 9 - (-1) number is difference.
9, 12 - 2 number is difference.
Next number is see before the series is 2, -1, 2, -1, 2.
Then finally we consider difference is -1. So, the answer is 10.
(2)
Simmi said:
9 years ago
7 + 1 = 8,
10 + 1 = 11,
8 + 1 = 9,
11 + 1 = 12,
9 + 1 = 10. Add 1 alternatively.
10 + 1 = 11,
8 + 1 = 9,
11 + 1 = 12,
9 + 1 = 10. Add 1 alternatively.
Ayush kumar said:
9 years ago
If we see the series, we can see that alternate digits are incorrect sequence 5.
7, 8, 9 then 10.
10, 11, 12.
7, 8, 9 then 10.
10, 11, 12.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers