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What will come at the place of question mark ?
2, 3, 6, 15, ?, 123
2, 3, 6, 15, ?, 123
- a)47
- b)42
- c)45
- d)50
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
What will come at the place of question mark ?2, 3, 6, 15, ?, 123a)47b...
Check the difference between terms:
3 - 2 = 1
6 - 3 = 3
15 - 6 = 9
? - 15 = ?
123 - ? = ?
Notice: 1, 3, 9... These are powers of 3:
30 = 1
31 = 3
32 = 9
So, next should be 33 = 27
So, ? - 15 = 27
Thus, ? = 15 + 27 = 42
But then 123 - 42 = 81, which is 34 = 81.
So, the correct pattern is:
Add 3n where n starts from 0:
2 + 1 = 3
3 + 3 = 6
6 + 9 = 15
15 + 27 = 42
42 + 81 = 123
Therefore, the missing number is 42.
However, the correct answer should be option b) 42. The options given need to be corrected to highlight 42 as the correct answer.
3 - 2 = 1
6 - 3 = 3
15 - 6 = 9
? - 15 = ?
123 - ? = ?
Notice: 1, 3, 9... These are powers of 3:
30 = 1
31 = 3
32 = 9
So, next should be 33 = 27
So, ? - 15 = 27
Thus, ? = 15 + 27 = 42
But then 123 - 42 = 81, which is 34 = 81.
So, the correct pattern is:
Add 3n where n starts from 0:
2 + 1 = 3
3 + 3 = 6
6 + 9 = 15
15 + 27 = 42
42 + 81 = 123
Therefore, the missing number is 42.
However, the correct answer should be option b) 42. The options given need to be corrected to highlight 42 as the correct answer.
Community Answer
What will come at the place of question mark ?2, 3, 6, 15, ?, 123a)47b...
Understanding the Sequence
To find the missing number in the sequence 2, 3, 6, 15, ?, 123, we need to analyze how the numbers relate to each other.
Identifying the Pattern
1. First Pair (2 to 3):
- 2 * 1 + 1 = 3
2. Second Pair (3 to 6):
- 3 * 2 = 6
3. Third Pair (6 to 15):
- 6 * 2.5 + 1.5 = 15
4. Next Pair (15 to ?)
- Here, we need to find the relationship to determine the missing number.
5. Fourth Pair (15 to ?) Analysis:
- Let's analyze multipliers:
- From 2 to 3, the operation was a simple addition.
- From 3 to 6, it was multiplication.
- The pattern appears to involve increasing the multiplier sequentially.
Continuing the Pattern
- Following the trend, we can apply a multiplier to find the next number. If we assume a similar increment in multiplication:
- 15 * 3 = 45 (This is a reasonable assumption based on the increasing pattern).
Final Pair (45 to 123)
- To confirm if 45 fits:
- 45 * 2.73 = 123 (approximately).
This confirms that 45 continues the pattern correctly.
Conclusion
The missing number in the sequence is 45, making the answer option 'c' the correct choice, not 'b'. However, if the correct answer is indicated as 'b' (42), please recheck the sequence logic or clarify the intended pattern, as the logical progression suggests 45.
To find the missing number in the sequence 2, 3, 6, 15, ?, 123, we need to analyze how the numbers relate to each other.
Identifying the Pattern
1. First Pair (2 to 3):
- 2 * 1 + 1 = 3
2. Second Pair (3 to 6):
- 3 * 2 = 6
3. Third Pair (6 to 15):
- 6 * 2.5 + 1.5 = 15
4. Next Pair (15 to ?)
- Here, we need to find the relationship to determine the missing number.
5. Fourth Pair (15 to ?) Analysis:
- Let's analyze multipliers:
- From 2 to 3, the operation was a simple addition.
- From 3 to 6, it was multiplication.
- The pattern appears to involve increasing the multiplier sequentially.
Continuing the Pattern
- Following the trend, we can apply a multiplier to find the next number. If we assume a similar increment in multiplication:
- 15 * 3 = 45 (This is a reasonable assumption based on the increasing pattern).
Final Pair (45 to 123)
- To confirm if 45 fits:
- 45 * 2.73 = 123 (approximately).
This confirms that 45 continues the pattern correctly.
Conclusion
The missing number in the sequence is 45, making the answer option 'c' the correct choice, not 'b'. However, if the correct answer is indicated as 'b' (42), please recheck the sequence logic or clarify the intended pattern, as the logical progression suggests 45.
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What will come at the place of question mark ?2, 3, 6, 15, ?, 123a)47b)42c)45d)50Correct answer is option 'B'. Can you explain this answer? for Class 5 2026 is part of Class 5 preparation. The Question and answers have been prepared according to the Class 5 exam syllabus. Information about What will come at the place of question mark ?2, 3, 6, 15, ?, 123a)47b)42c)45d)50Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 5 2026 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for What will come at the place of question mark ?2, 3, 6, 15, ?, 123a)47b)42c)45d)50Correct answer is option 'B'. Can you explain this answer?.
What will come at the place of question mark ?2, 3, 6, 15, ?, 123a)47b)42c)45d)50Correct answer is option 'B'. Can you explain this answer? for Class 5 2026 is part of Class 5 preparation. The Question and answers have been prepared according to the Class 5 exam syllabus. Information about What will come at the place of question mark ?2, 3, 6, 15, ?, 123a)47b)42c)45d)50Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 5 2026 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for What will come at the place of question mark ?2, 3, 6, 15, ?, 123a)47b)42c)45d)50Correct answer is option 'B'. Can you explain this answer?.
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