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:
85 comments Page 1 of 9.
Yug Prajapati said:
1 year ago
The gaps between the numbers can also be considered;
14, 28,20,40,32,64,.......
14-20 =6
20-32=12(6*2)
So,
This continues and the gap between the 32 and ans will be 24(12*2) and we got ans as 56.
or
The gaps between the 2nd and 4th no is 12 and the gap between the 4th and 6th no is 24.
14, 28,20,40,32,64,.......
14-20 =6
20-32=12(6*2)
So,
This continues and the gap between the 32 and ans will be 24(12*2) and we got ans as 56.
or
The gaps between the 2nd and 4th no is 12 and the gap between the 4th and 6th no is 24.
(17)
Praveen said:
2 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.
(144)
Baishali Das said:
2 years ago
56 is the right answer.
(13)
Aditya Singh said:
2 years ago
Also, multiple of 6 are being added if you take alternate numbers.
14 + 6 = 20,
20 + 12 = 32,
32 + 24 = 56 Ans.
14 + 6 = 20,
20 + 12 = 32,
32 + 24 = 56 Ans.
(28)
Ishita said:
3 years ago
We can also do like this;
14 + 14=28.
28 - 8 = 20,
20 + 20 = 40,
40 - 8 = 32,
32 + 32 = 64,
64 - 8 = 56.
14 + 14=28.
28 - 8 = 20,
20 + 20 = 40,
40 - 8 = 32,
32 + 32 = 64,
64 - 8 = 56.
(97)
PRIYANKA FEGDE said:
3 years ago
Alternately 14, 20, 32, 56.
14 + 6 = 20.
20 + 12 = 32.
32 + 24 = 56.
14 + 6 = 20.
20 + 12 = 32.
32 + 24 = 56.
(15)
Mathi said:
3 years ago
50 is also the right answer.
(24)
Nima dorji said:
3 years ago
Sir I didn't get it. Can anyone explain once more?
(5)
Mohammad saqib said:
3 years ago
There is double of ist number and subtracted by 8 which means
14+14=28-8=20,
20+20=40-8=32,
32+32=64-8=56.
Therefore 56, 112 will be the next pair
Therefore 56.
14+14=28-8=20,
20+20=40-8=32,
32+32=64-8=56.
Therefore 56, 112 will be the next pair
Therefore 56.
(8)
Rishav Chakrabarti said:
4 years ago
Answer should be 128.
Explanation :
Sequence - 14 , 28 , 20 , 40 , 32 , 64.
If clearly examined we see;
28 = 14 x 2.
40 = 20 x 2.
60 = 32 x 2.
So the "x2" remains the same in all cases.
Hence the next number will be : 64 x 2 = 128.
Explanation :
Sequence - 14 , 28 , 20 , 40 , 32 , 64.
If clearly examined we see;
28 = 14 x 2.
40 = 20 x 2.
60 = 32 x 2.
So the "x2" remains the same in all cases.
Hence the next number will be : 64 x 2 = 128.
(17)
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