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Which number will replace the question mark (?) in the following series?
4, 13, 9, 17, 19, 19, 39, 23, ?, 25
- a)79
- b)87
- c)97
- d)78
Correct answer is option 'A'. Can you explain this answer?
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Most Upvoted Answer
Which number will replace the question mark (?) in the following seri...
Explanation:
Identifying the pattern:
- The series is: 4, 13, 9, 17, 19, 19, 39, 23, ?, 25
- Upon closer observation, we can see that the series alternates between adding and subtracting certain numbers.
Calculating the differences:
- 13 - 4 = 9
- 17 - 9 = 8
- 19 - 17 = 2
- 39 - 19 = 20
- 23 - 39 = -16
- ? - 23 = 2
Finding the missing number:
- Based on the pattern observed, the differences are 9, 8, 2, 20, -16, 2
- The next difference should be 2 (alternating)
- Therefore, 23 + 2 = 25
Conclusion:
- Hence, the missing number in the series is 25. The correct answer is option A.
Identifying the pattern:
- The series is: 4, 13, 9, 17, 19, 19, 39, 23, ?, 25
- Upon closer observation, we can see that the series alternates between adding and subtracting certain numbers.
Calculating the differences:
- 13 - 4 = 9
- 17 - 9 = 8
- 19 - 17 = 2
- 39 - 19 = 20
- 23 - 39 = -16
- ? - 23 = 2
Finding the missing number:
- Based on the pattern observed, the differences are 9, 8, 2, 20, -16, 2
- The next difference should be 2 (alternating)
- Therefore, 23 + 2 = 25
Conclusion:
- Hence, the missing number in the series is 25. The correct answer is option A.
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Community Answer
Which number will replace the question mark (?) in the following seri...
The pattern followed is given below:
As it can be seen that the obtained number is "79".
Hence, the correct answer is "79".
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Which number will replace the question mark (?) in the following series?4, 13, 9, 17, 19, 19, 39, 23, ?, 25a)79b)87c)97d)78Correct answer is option 'A'. Can you explain this answer?
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