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:
189 comments Page 11 of 19.
Sandeep Kumar said:
7 years ago
Let me tell you.
As you know that term of geometric progression.
a/r, a, ar, ar2.
So if we write in this form ar, a, a/r, a/r2.
Where a =1 (Constant) and r=2 (Common Ratio).
i.e it can be written 2, 1, 1/2, 1/4, 1/8.
As you know that term of geometric progression.
a/r, a, ar, ar2.
So if we write in this form ar, a, a/r, a/r2.
Where a =1 (Constant) and r=2 (Common Ratio).
i.e it can be written 2, 1, 1/2, 1/4, 1/8.
Ibraz khan said:
7 years ago
@Shubham.
Keep taking the difference
15. 105, 315, 693, 1728, at last, you will get 48 common. By solving it we get the answer 2145.
Keep taking the difference
15. 105, 315, 693, 1728, at last, you will get 48 common. By solving it we get the answer 2145.
Sravani said:
8 years ago
Nice explanation. Thanks all.
Shiva said:
8 years ago
Thanks for explaining the answer.
Arpita Roy said:
8 years ago
I am not getting this. Can anyone help me to get it?
Arpita Roy said:
8 years ago
Thank you all for explaining it.
Raju said:
8 years ago
Thank you all.
Nitish pandey said:
8 years ago
Am not getting it please explain.
Santosh goswami said:
8 years ago
I am not getting this, Please explain this.
Bhavana said:
9 years ago
Let the given series is A, B, C, D. If we divide D/C OR C/B OR B/A (in the order of the series, we get 1/2).
That shows A * 1/2 =B AND B * 1/2 = C.
SO,THE NEXT TERM IS D*1/2 = 1/4*1/2 = 1/8.
That shows A * 1/2 =B AND B * 1/2 = C.
SO,THE NEXT TERM IS D*1/2 = 1/4*1/2 = 1/8.
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