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 8 of 11.
Tulasi said:
10 years ago
Odd positions are increased by 1. And even positions are increased by 1.
Uday said:
10 years ago
First find out the difference of these nos
7-10=3.
10-8=2.
8-11=3.
11-9=2.
9-12=3.
Consider no 3 as no 2 as now.
7+3=10.
10-2=8.
8+3=11.
11-2=9.
9+3=12.
12-2=10.
7-10=3.
10-8=2.
8-11=3.
11-9=2.
9-12=3.
Consider no 3 as no 2 as now.
7+3=10.
10-2=8.
8+3=11.
11-2=9.
9+3=12.
12-2=10.
Chandu said:
1 decade ago
Answer is 10.
7+3 = 10-2 = 8+3 = 11-2 = 9+3 = 12-2 = 10.
7+3 = 10-2 = 8+3 = 11-2 = 9+3 = 12-2 = 10.
Perin said:
1 decade ago
Answer should be 10. Add 1 to alternate numbers.
Macanet said:
1 decade ago
What makes 10, the answer?
Shiva kumar singh said:
1 decade ago
7 add 3 equal 10.
10 subtract 2 equal 8.
8 add 3 equal 11.
11 subtract 2 equal 9.
9 add 3 equal 12.
12 subtract 2 equal 10.
So that answer is 10 right.
10 subtract 2 equal 8.
8 add 3 equal 11.
11 subtract 2 equal 9.
9 add 3 equal 12.
12 subtract 2 equal 10.
So that answer is 10 right.
Shubhi said:
1 decade ago
Here a simple concept is taken under use that is take first no 7.
Follow logic that once you add 3 in that no so:
7+3 = 10.
That whatever no you get now subtract by 2.
10-2 = 8. (continues process).
So again add 3 whatever got subtract by 2 and continues series.
Follow logic that once you add 3 in that no so:
7+3 = 10.
That whatever no you get now subtract by 2.
10-2 = 8. (continues process).
So again add 3 whatever got subtract by 2 and continues series.
Shrikant said:
1 decade ago
Add all the numbers and then divide it with 6. Because there are total 6 nos given, as the answer will come.
E.g: 7+10+8+11+9+12=57.
57/6 = 9.5.
Round figure is 10.
E.g: 7+10+8+11+9+12=57.
57/6 = 9.5.
Round figure is 10.
Jai kishan said:
1 decade ago
Can any one explain it briefly with more examples?
Devi said:
1 decade ago
Why should we take the number 3?
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