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:
87 comments Page 5 of 9.
Yuvaraj said:
6 years ago
The solution is;
14*2=28, 28-8=20;.
20*2=40, 40-8=32;.
32*2=64, 64-8=56;.
14*2=28, 28-8=20;.
20*2=40, 40-8=32;.
32*2=64, 64-8=56;.
Milan said:
6 years ago
14, 28, 20, 40, 32, 64, (56)
14(+6)-->>20.
20(+12)-->>32.
32(+24)-->>56.
28(+12)-->>40.
40(+24)-->>64.
64(+48)-->>112.
14(+6)-->>20.
20(+12)-->>32.
32(+24)-->>56.
28(+12)-->>40.
40(+24)-->>64.
64(+48)-->>112.
Siddharth said:
6 years ago
14+6 = 20.
20+(6*2) = 32.
32+24 = 56.
20+(6*2) = 32.
32+24 = 56.
Janhavi said:
2 weeks ago
Very useful session. Thanks all for explaining.
Jack said:
1 decade ago
+14
-8
+20
-8
+32
-8
-8
+20
-8
+32
-8
Harpreet kaur 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.
Neha Ramteke said:
1 decade ago
The series is : 14 28 20 40 32 64
14+6=20
20+12=32
32+24=56
28+12=40
40+24=64
Each time the number doubles
i.e first we add 6
Then double of 6 i.e 12
After that we double 12 i.e 24..
In this way, we can get the answer.
14+6=20
20+12=32
32+24=56
28+12=40
40+24=64
Each time the number doubles
i.e first we add 6
Then double of 6 i.e 12
After that we double 12 i.e 24..
In this way, we can get the answer.
ASAD said:
1 decade 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
Shine said:
1 decade ago
14, 28, 20, 40, 32, 64, ...X?
32- 20 = 12
20 - 14 = 6
Hence X - 32 = 24 i.e {6,12,24...}
Then = 32+ 24= 56
X = Answer is 56
32- 20 = 12
20 - 14 = 6
Hence X - 32 = 24 i.e {6,12,24...}
Then = 32+ 24= 56
X = Answer is 56
Sufi_azmat said:
1 decade ago
14,28,20,40,32,64,x
*2
-8
*2
-8
*2
-8
*2
-8
*2
-8
*2
-8
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