Logical Reasoning - Number Series - Discussion

Discussion Forum : Number Series - Type 3 (Q.No. 15)
Directions to Solve
Look carefully for the pattern, and then choose which pair of numbers comes next.

15.
16 26 56 36 46 68 56
80 66
64 82
66 80
78 68
66 82
Answer: Option
Explanation:
Here, every third number follows a different pattern from the main series. In the main series, beginning with 16, 10 is added to each number to arrive at the next. In the alternating series, beginning with 56, 12 is added to each number to arrive at the next.
Discussion:
45 comments Page 1 of 5.

Rohan Kalubarme said:   1 year ago
1st & 2nd numbers = 16, 26.

Then
4th & 5th numbes = 36, 46.
Then as per the series repeated,
7th & 8th = 56,[ 66].

Now,
After the first 2 numbers = 56.
Again after 2 numbers = 56 + 12 = 68.
As per series = 68 + 12 = [80].

According to logic answer is,
[66,80].

Hope this is helpful.
(11)

Faheema Fayaz said:   2 years ago
16+10 = 26,
36+10 = 46,
56+10 = 66,
56+12 = 68,
68+12 = 80,

Ans: 66 80.
(5)

Zhav Mek said:   2 years ago
Let's assume the two unknown numbers be x and y respectively.
16 26 56 36 46 68 56 x y.

Let (in sequence)
[ 16 26 56 ] be series (a)
[36 46 68 ] be series (b) and
[56 x y ] be series (c).

Now substrate (b-a)
36 46 68 ------> (b)
16 26 56 -------> (a)
i.e = 20 20 12 ------> (i)
{These are the difference between a and b series}

Now, add the difference (i) with (b)
36 46 68 ------> (b)
20 20 12-------> (i)
=56 66 80 (answer)

x = 66,
y = 80.
(21)

Pooja yadav said:   4 years ago
26 - 16 = 10
68 - 56 = 12(after two nos.)
46 - 36 = 10
80 - 68 = 12
66 - 56 = 10.
Hope you understand.
(8)

Laiba said:   4 years ago
I cannot understand the logic. Please anyone help me to get it.
(5)

Tamil selvan said:   4 years ago
Thanks all for explaining this.
(1)

K .rohith said:   5 years ago
Thank you @Raunak.

Pradip769 said:   6 years ago
In the given series,

First second---- fourth fifth---- seventh eighth....... are one series which is +10 for next reach like 26, 36, 46, 56, (66),76 ...
Similarly, third---- sixth---- ninth... are the second series which is +12 for next reach like 56, 68, (80), 92...

So the answer is 66, 80.
(5)

Ajay said:   6 years ago
16 26 56 vertically +20.
36 46 68. Vertically +20.
56 66 80 vertically +12.
(1)

Ajay said:   6 years ago
16 26 56 vertically +20.
36 46 68. Vertically +20.
56 66 80 vertically +12.


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