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:
183 comments Page 10 of 19.
Utharsh said:
1 decade ago
Every time the denominator get doubled and the numerator rest with 1.
Umesh said:
1 decade ago
Here if we multiply each number By 1/2 the we will get next number.
Akshay said:
1 decade ago
1/8
From 1 to each number is divided by 2 than we get next number.
From 1 to each number is divided by 2 than we get next number.
M.ratnakar said:
1 decade ago
How we got the logic can you explain detail.
4/2 = 2
2/2 = 1
1/2 = 1/2
(1/2)/2 = 1/4
(1/4)/2 = 1/8 and so on.
4/2 = 2
2/2 = 1
1/2 = 1/2
(1/2)/2 = 1/4
(1/4)/2 = 1/8 and so on.
Lisa Price said:
1 decade ago
I need help finding the next number in the series to:
1. 18,81,27,36,63?
2. 1/64,1/32,1/16,1/8,1/4,1/2?
3. 36,37,39,42,46,51?
4. 8,4,2,1,.5,.25,.25?
5. 2,4,6,5,7,9,8?
6. 154,77,81,78,39,43,40?
7. 1/2,1/4,1/3,1/6,1/5?
8. 2,3,4,8,9,10,20,21,22?
9. 2,5,14,41,122?
10. 15,18,54,57,171?
11. 18,81,27,72,36,63?
12. 1/64,1/32,1/16,1/8,1/4,1/2?
13. 36,37,39,42,46,51?
14. 2,4,6,5,7,9,8?
15. 154,77,81,78,39,43,40?
1. 18,81,27,36,63?
2. 1/64,1/32,1/16,1/8,1/4,1/2?
3. 36,37,39,42,46,51?
4. 8,4,2,1,.5,.25,.25?
5. 2,4,6,5,7,9,8?
6. 154,77,81,78,39,43,40?
7. 1/2,1/4,1/3,1/6,1/5?
8. 2,3,4,8,9,10,20,21,22?
9. 2,5,14,41,122?
10. 15,18,54,57,171?
11. 18,81,27,72,36,63?
12. 1/64,1/32,1/16,1/8,1/4,1/2?
13. 36,37,39,42,46,51?
14. 2,4,6,5,7,9,8?
15. 154,77,81,78,39,43,40?
Vinod said:
1 decade ago
Hey its very easy see.
2^1, 2^0, 2^-1, 2^-2, 2^-3
2^1=2
2^0=1
2^-1=(1/2)
2^-2=(1/4)
2^-3=(1/8)
2^1, 2^0, 2^-1, 2^-2, 2^-3
2^1=2
2^0=1
2^-1=(1/2)
2^-2=(1/4)
2^-3=(1/8)
Avinash goyal said:
1 decade ago
Every time the denominator get doubled and the numerator rest with 1.
Trinadh.K said:
1 decade ago
@Lisa Price:
1. 18, 81, 27, 36, 63, 45, 54, 45....
2. 1/64, 1/32, 1/16, 1/8, 1/4, 1/2, 1, 2, 4... (you just multiply with 2).
3. 36, 37, 39, 42, 46, 51, 57, 64.. (+1 +2 +3 +4 +5 +6 +7).
1. 18, 81, 27, 36, 63, 45, 54, 45....
2. 1/64, 1/32, 1/16, 1/8, 1/4, 1/2, 1, 2, 4... (you just multiply with 2).
3. 36, 37, 39, 42, 46, 51, 57, 64.. (+1 +2 +3 +4 +5 +6 +7).
Sravan handsome said:
1 decade ago
How we will expect first number is 4?
Sagar said:
1 decade ago
I want to say that this series consist of successive powers of 2.
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