Logical Reasoning - Number Series - Discussion
Discussion Forum : Number Series - Type 2 (Q.No. 15)
Directions to Solve
Look carefully for the pattern, and then choose which pair of numbers comes next.
15.
61 57 50 61 43 36 61
Answer: Option
Explanation:
This is an alternating repetition series, in which a random number, 61, is interpolated as every third number into an otherwise simple subtraction series. Starting with the second number, 57, each number (except 61) is 7 less than the previous number.
Discussion:
16 comments Page 1 of 2.
Harshal said:
1 decade ago
I think Option b & d can also be correct one. Because they have difference = 7.
Then why you have chosen E as your answer?
Then why you have chosen E as your answer?
Sundar said:
1 decade ago
@Harshal:
We have to find "which pair of numbers comes next (given direction)".
Given: [61] 57 50 [61] 43 36 [61] __ __ and so on.
57 - 7 = 50
50 - 7 = 43
43 - 7 = 36
36 - 7 = 29 (Required number)
29 - 7 = 22 (Required number)
22 - 7 = 15
15 - 7 = 08 ... and so on.
I hope you understand. Have a nice day!
We have to find "which pair of numbers comes next (given direction)".
Given: [61] 57 50 [61] 43 36 [61] __ __ and so on.
57 - 7 = 50
50 - 7 = 43
43 - 7 = 36
36 - 7 = 29 (Required number)
29 - 7 = 22 (Required number)
22 - 7 = 15
15 - 7 = 08 ... and so on.
I hope you understand. Have a nice day!
Rohit said:
1 decade ago
Its a nice que. It may look simple but has something to do with it.
Sanjeev said:
1 decade ago
Good one.
Khushboo pandey said:
1 decade ago
Its a good question. It look very simple but behind it very good reasoning is present.
Anurag said:
1 decade ago
First of three Nos: 17 17 34..
Second: 20 20 31..
Third of three: 23 23 28..
Sol: 17 +3 17+3 34-3 so on...
Second: 20 20 31..
Third of three: 23 23 28..
Sol: 17 +3 17+3 34-3 so on...
Gaurav Agarwal said:
1 decade ago
Guys,
I guess there are two trends which are prominent in the data set.
One- Is explained above and has been termed as right answer.
The other one is as below:
61
57 61-57 -4.
50 57-50 -7.
61 50-61 11 (Its the sum of prev two differences).
43 61-43 -18.
36 43-36 -7.
61 36-61 25 (Its the sum of prev two differences).
27 61-27 -34.
20 27-20 -7.
61 20-61 41 (Its the sum of prev two differences).
Correct Answer through this method: 27 20.
I guess there are two trends which are prominent in the data set.
One- Is explained above and has been termed as right answer.
The other one is as below:
61
57 61-57 -4.
50 57-50 -7.
61 50-61 11 (Its the sum of prev two differences).
43 61-43 -18.
36 43-36 -7.
61 36-61 25 (Its the sum of prev two differences).
27 61-27 -34.
20 27-20 -7.
61 20-61 41 (Its the sum of prev two differences).
Correct Answer through this method: 27 20.
Vinay kumar said:
1 decade ago
Find the given series in an direction.
The pair is 29, 22
How means,
61 57 50 61 43 36 61.
61-57 = 4.
(adding 7 of each ans.).
61-50 = 11.
61-43 = 18.
61-36 = 25.
61-(29) = 32.
61-(22) = 39.
(or)
In series you take 3 no.s.
Difference b/n 57&50 with respect to 43 &36 is 14.
43-14 = 29.
36-14 = 22.
Pair is(29 22).
The pair is 29, 22
How means,
61 57 50 61 43 36 61.
61-57 = 4.
(adding 7 of each ans.).
61-50 = 11.
61-43 = 18.
61-36 = 25.
61-(29) = 32.
61-(22) = 39.
(or)
In series you take 3 no.s.
Difference b/n 57&50 with respect to 43 &36 is 14.
43-14 = 29.
36-14 = 22.
Pair is(29 22).
Gaphur said:
9 years ago
No, option c is the correct answer.
(1)
Sowmya said:
7 years ago
Nice explanation, Thanks @Sundar.
(2)
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