Logical Reasoning - Number Series - Discussion
Discussion Forum : Number Series - Type 1 (Q.No. 12)
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
12.
Look at this series: 14, 28, 20, 40, 32, 64, ... What number should come next?
Answer: Option
Explanation:
This is an alternating multiplication and subtracting series: First, multiply by 2 and then subtract 8.
Discussion:
86 comments Page 7 of 9.
PANKAJ RIYAR said:
1 decade ago
14+14=28
28-8=20
20+20=40
40-8=32
32+32=64
64-8=56
28-8=20
20+20=40
40-8=32
32+32=64
64-8=56
Anil said:
1 decade ago
Why we should mutiply by 2 and add 8 ?
Ravikumar said:
1 decade ago
14*2=28,28-8=20;
20*2=40,40-8=32;
32*2=64,64-8=56;
yes this is the procedure
20*2=40,40-8=32;
32*2=64,64-8=56;
yes this is the procedure
Vishnu Sharma said:
2 decades ago
14*2=28-8=20*2=40-8=32*2=64-8=56*2=112
14 28 20 40 32 64 56 112
14 28 20 40 32 64 56 112
Praveen said:
2 decades ago
No sir. I did not get the answer.
Gideon Brian said:
1 decade ago
I have this question: A series has 17 numbers, if the second is 3, what is the fast number?
Sushant said:
10 years ago
Check let us take alternate no 14, 20, 32.
First . 14+6 = 20.
20+12= 32.
32+24 = 56.
So answer 56.
First . 14+6 = 20.
20+12= 32.
32+24 = 56.
So answer 56.
Ajay said:
10 years ago
14*2 = 28.
28-8 = 20.
20*2 = 40.
40-8 = 32.
32*2 = 64.
64-8 = 56.
28-8 = 20.
20*2 = 40.
40-8 = 32.
32*2 = 64.
64-8 = 56.
Arnab said:
10 years ago
One more solution,
14, 28, 20, 40, 32, 64
It can be add 24 or 18.
14*2 = 28,
14+6 = 20,
20*2 = 40,
20+(6*2) = 32,
32*2 = 64,
Then 32+(6*4) = 56.
14, 28, 20, 40, 32, 64
It can be add 24 or 18.
14*2 = 28,
14+6 = 20,
20*2 = 40,
20+(6*2) = 32,
32*2 = 64,
Then 32+(6*4) = 56.
Roshan Roy said:
10 years ago
The formula is first multiply by 2 then subtract by 8 :
14 x 2 = 28.
28 - 8 = 20.
20 x 2 = 40.
40 - 8 = 32.
32 x 2 = 64.
Since 64 - 8 = 56.
Therefore the answer is B. 56.
14 x 2 = 28.
28 - 8 = 20.
20 x 2 = 40.
40 - 8 = 32.
32 x 2 = 64.
Since 64 - 8 = 56.
Therefore the answer is B. 56.
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