Verbal Reasoning - Series Completion - Discussion
Discussion Forum : Series Completion - Section 1 (Q.No. 39)
Directions to Solve
Choose the correct alternative that will continue the same pattern and replace the question mark in the given series.
39.
In the series 10, 17, 24, 31, 38,.....which of the following will be a number of the series ?
Answer: Option
Explanation:
The given series consists of numbers each of which, on dividing by 7, leaves a
remainder 3. No other number except 346 satisfies the property.
Discussion:
6 comments Page 1 of 1.
Anuradha prashant said:
6 years ago
Deduct 38 (that is last option) from 346 and you will get 308 which can be divided by 7.
Kamalesh Kumar T said:
10 years ago
17-10 = 7.
24-17 = 7.
31-24 = 7.
Therefore this is in AP. By applying AP formula we get.
An = A1+(n-1)D. Here A1 = 10 and D = 7. Substitute and work it out. If we get an as natural number then its the answer.
Only 346 will get an as natural as an= 47 others won't.
24-17 = 7.
31-24 = 7.
Therefore this is in AP. By applying AP formula we get.
An = A1+(n-1)D. Here A1 = 10 and D = 7. Substitute and work it out. If we get an as natural number then its the answer.
Only 346 will get an as natural as an= 47 others won't.
Kiran Kumar CV said:
1 decade ago
Leave the first digit, then take 7 as multiple of the next digits last numbers, then goes on multiplications, consider 17, 24, 31, 38,......as 7, 14, 21, 28, 35, 42, 49, 56.
Then 7*8 = 56 you will get the last digit as 6. Then check the answer having 6 as last digit. From the answer only 346 will be correct.
Then 7*8 = 56 you will get the last digit as 6. Then check the answer having 6 as last digit. From the answer only 346 will be correct.
Pinku said:
1 decade ago
But this is not the proper answer how we can go with 346 any one can explain please?
Riya said:
1 decade ago
@santhu
but 45 is not intha option..:) so you have to consider theprevious idea..
but 45 is not intha option..:) so you have to consider theprevious idea..
Santhu said:
1 decade ago
Why don't you think like this way?
In the given series each number is added with 7 so on adding 38 with 7 we get 45. Please correct me if thinking is wrong.
In the given series each number is added with 7 so on adding 38 with 7 we get 45. Please correct me if thinking is wrong.
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