Logical Reasoning - Number Series - Discussion
Discussion Forum : Number Series - Type 1 (Q.No. 1)
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
1.
Look at this series: 2, 1, (1/2), (1/4), ... What number should come next?
Answer: Option
Explanation:
This is a simple division series; each number is one-half of the previous number.
In other terms to say, the number is divided by 2 successively to get the next result.
4/2 = 2 2/2 = 1 1/2 = 1/2 (1/2)/2 = 1/4 (1/4)/2 = 1/8 and so on.
Discussion:
182 comments Page 12 of 19.
Shubhi said:
1 decade ago
Very easy just half and divided by 2 like in:
Step 1: Take a no 4 itself.
4/2 = 2.
Step 2: After that half the number, so 4/2 = 2 and then divide by 2.
2/2 = 1.
Step 3:
1/2 = 1/2.
(1/2)/2 = 1/4.
(1/4)/2 = 1/8 and so on.
Step 1: Take a no 4 itself.
4/2 = 2.
Step 2: After that half the number, so 4/2 = 2 and then divide by 2.
2/2 = 1.
Step 3:
1/2 = 1/2.
(1/2)/2 = 1/4.
(1/4)/2 = 1/8 and so on.
Jeevagan said:
1 decade ago
It's not that big issue.!
First look at the series then start relating between them.
Ex:
Here in the series 2, 1, 1/2, 1/4,....
Just by first analysis we can conclude that next no. To 1st no is half time to it, and the logic is checked with next successive no.
Step 1:- 2,
Step 2:- 2, 1==>2, 2/2 (1),...
Step 3:- 2, 1, 1/2==>2, 2/2 (1) , 1/2 (1/2),....
Step 4:- 2, 1, 1/2, 1/4==>2, 2/2 (1), 1/2 (1/2) , (1/2) /2 (1/4),...
First look at the series then start relating between them.
Ex:
Here in the series 2, 1, 1/2, 1/4,....
Just by first analysis we can conclude that next no. To 1st no is half time to it, and the logic is checked with next successive no.
Step 1:- 2,
Step 2:- 2, 1==>2, 2/2 (1),...
Step 3:- 2, 1, 1/2==>2, 2/2 (1) , 1/2 (1/2),....
Step 4:- 2, 1, 1/2, 1/4==>2, 2/2 (1), 1/2 (1/2) , (1/2) /2 (1/4),...
Papu said:
1 decade ago
Answer can solve in this step 1/2*1/4*1/8*1/16 in this type.
Yanmar said:
1 decade ago
1/3=1.
1/4=2.
1/5=3.
1/6=4 and so on.
1/4=2.
1/5=3.
1/6=4 and so on.
Bank po said:
1 decade ago
Someone help me to find the next digit of the series 2, 6, 4, 12, 10.
Manisha said:
10 years ago
4*1/2 = 2.
2*1/2 = 1.
1*1/2 = 1/2.
1/2*1/2 = 1/4.
1/4*1/2 = 1/8.
2*1/2 = 1.
1*1/2 = 1/2.
1/2*1/2 = 1/4.
1/4*1/2 = 1/8.
Mostafiz said:
10 years ago
How does it possible?
Basavaraj said:
10 years ago
That's simple friends it is 1/8.
Jass sukhana said:
10 years ago
Its very simple guys. Just need to be looking carefully.
Daniel said:
10 years ago
The series is geometric progression.
a2 divide by a1 so 1/2 and a3 by a2 so 1/2/1/1.
So the comment ratio is 1/2.
2, 1, 1/2, 1/4, 1/8.
a2 divide by a1 so 1/2 and a3 by a2 so 1/2/1/1.
So the comment ratio is 1/2.
2, 1, 1/2, 1/4, 1/8.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers