Logical Reasoning - Number Series - Discussion
Discussion Forum : Number Series - Type 1 (Q.No. 11)
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
11.
Look at this series: 1.5, 2.3, 3.1, 3.9, ... What number should come next?
Answer: Option
Explanation:
In this simple addition series, each number increases by 0.8.
Discussion:
45 comments Page 1 of 5.
Prashanth said:
4 years ago
Hi I have doubt.
I have taken the difference between consecutive terms for this question like I have added 3.1 bcos the diff between 3.1 and 1.5 is 1.6 and I have added that 1.6 to 3.1 to get the answer 4.7 is my method correct or not?
Please, anyone explain.
I have taken the difference between consecutive terms for this question like I have added 3.1 bcos the diff between 3.1 and 1.5 is 1.6 and I have added that 1.6 to 3.1 to get the answer 4.7 is my method correct or not?
Please, anyone explain.
(10)
Kartik Ahuja said:
1 decade ago
Another solution is there.
Just add the digits of the individual number to once digit extent.
Like,
1+5, 2+3, 3+1, 3+9.
6, 5, 4, 3, now is 2 therefore option C is correct as 4+7=11 then 1+1=2 this complete the series.
Just add the digits of the individual number to once digit extent.
Like,
1+5, 2+3, 3+1, 3+9.
6, 5, 4, 3, now is 2 therefore option C is correct as 4+7=11 then 1+1=2 this complete the series.
Anu said:
1 decade ago
Take the series as 15, 23, 31, 39...
Adding 8 to the previous number will give the next no.
15+8=23
23+8=31
31+8=39
So, 39+8= 47 for the series 15, 23, 31, 39..
And 4.7 for the series 1.5, 2.3, 3.1, 3.9...
Adding 8 to the previous number will give the next no.
15+8=23
23+8=31
31+8=39
So, 39+8= 47 for the series 15, 23, 31, 39..
And 4.7 for the series 1.5, 2.3, 3.1, 3.9...
Urvam said:
9 years ago
We can also solve this question in such a way:
As in all terms, 1 is added to LHS digit and 2 is subtracted in RHS digit.
1 + 1 = 2 & 5 - 2 = 3 = 23.
As well as.
2 + 1 = 3 & 3 - 2 = 1 = 31.
As in all terms, 1 is added to LHS digit and 2 is subtracted in RHS digit.
1 + 1 = 2 & 5 - 2 = 3 = 23.
As well as.
2 + 1 = 3 & 3 - 2 = 1 = 31.
Ron said:
5 years ago
1.5 + 0.8 = 2.3.
2.3 + 0.8 = 3.1.
3.1 + 0.8 = 3.9.
3.9 + 0.8 = 4.7.
It's because when we add 0.8 in each answer we will get the next digit. So, when we add 3.9 + 0.8 so our answer will be 4.7.
2.3 + 0.8 = 3.1.
3.1 + 0.8 = 3.9.
3.9 + 0.8 = 4.7.
It's because when we add 0.8 in each answer we will get the next digit. So, when we add 3.9 + 0.8 so our answer will be 4.7.
(14)
Foram said:
6 years ago
Assume that there is no (.) in the series,
15 , 23 , 31 , 39
+8 +8 +8
Add 8 in the next numbers,
So, adding +8 in the 39 the answer will be 47.
And finally, the answer is 4.7.
15 , 23 , 31 , 39
+8 +8 +8
Add 8 in the next numbers,
So, adding +8 in the 39 the answer will be 47.
And finally, the answer is 4.7.
(12)
Bitra gopinath said:
6 years ago
1.5, 2.3, 3.1, 3.9,.... Multiply this number by 10 15 23 31 39 ....
Take their difference which is 8.
Then 39+8 = 47.
Now divide it by 10 which gives answer 4.7.
Take their difference which is 8.
Then 39+8 = 47.
Now divide it by 10 which gives answer 4.7.
(7)
Roshan Roy said:
9 years ago
The formula is +0.8 to the number in the question to get the sum :
1.5+0.8 = 2.3,
2.3+0.8 = 3.1,
3.1+0.8 = 3.9,
3.9+0.8 = 4.7.
Therefore the answer is 4.7.
1.5+0.8 = 2.3,
2.3+0.8 = 3.1,
3.1+0.8 = 3.9,
3.9+0.8 = 4.7.
Therefore the answer is 4.7.
Vishal mittal said:
8 years ago
1.5, 2.3, 3.1, 3.9,.... Multiply this number by 10 15 23 31 39 ....
Take their difference which is 8
Then 39+8=47
Now divide it by 10 which gives answer 4.7.
Take their difference which is 8
Then 39+8=47
Now divide it by 10 which gives answer 4.7.
Jagannath rout said:
8 years ago
2.3-1.5 = 0.8
3.1-2.3 = 0.8
3.9-3.1 = 0.8 (Just tell me about how acquire 4.7 this solution ) just addition 3.9+0.8 = 4.7
4.7-3.9 = 0.8.
3.1-2.3 = 0.8
3.9-3.1 = 0.8 (Just tell me about how acquire 4.7 this solution ) just addition 3.9+0.8 = 4.7
4.7-3.9 = 0.8.
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