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 2 of 9.
Mehvish said:
3 months ago
= 14 → 28 (×2)
= 28 → 20 (−8)
= 20 → 40 (×2)
= 40 → 32 (−8)
= 32 → 64 (×2).
So, the pattern alternates between ×2 and −8.
Next step should follow the same alternation:
After ×2 → −8.
So, 64 − 8 = 56.
= 28 → 20 (−8)
= 20 → 40 (×2)
= 40 → 32 (−8)
= 32 → 64 (×2).
So, the pattern alternates between ×2 and −8.
Next step should follow the same alternation:
After ×2 → −8.
So, 64 − 8 = 56.
(4)
Aarushi said:
5 years ago
14*2 = 28 - 8 = 20,
20*2 = 40 - 8 = 32,
32*2 = 64 - 8 = 56.
20*2 = 40 - 8 = 32,
32*2 = 64 - 8 = 56.
(2)
Tirtha Datta said:
5 years ago
14 * 2 = 28,
(14 + 6) * 2 = 40,
(20 + 12) * 2 = 64,
(32 + 24) * 2 = 122.
(14 + 6) * 2 = 40,
(20 + 12) * 2 = 64,
(32 + 24) * 2 = 122.
(1)
Nikhilaadarsa said:
8 years ago
Why 128 is not an answer? I still can't understand. Can someone explain this to me?
Ladani Namrata said:
10 years ago
My Answer = 56.
14 + 6 = 20,
20 + (6*2) = 32.
32 + (12*2) = 56.
14 + 6 = 20,
20 + (6*2) = 32.
32 + (12*2) = 56.
KARTHICKRAJA said:
8 years ago
14 28 - Difference is 8 (28-8=20)
20 40 - Difference is 8 (40-8=32)
32 64 - Difference is 8 (64-8=56)
So, 56.
20 40 - Difference is 8 (40-8=32)
32 64 - Difference is 8 (64-8=56)
So, 56.
Raj said:
8 years ago
@Aswath.
Why 50 is not an answer? I still can't understand. Can someone explain this to me?
Why 50 is not an answer? I still can't understand. Can someone explain this to me?
ASWATH G said:
8 years ago
Answer is 56 only. I agree.
Bhavana said:
8 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.
Nitish Pandey said:
9 years ago
I think the answer must be 128.
14*2=28.
20*2=40.
32*2=64.
64*2=128.
14*2=28.
20*2=40.
32*2=64.
64*2=128.
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