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Look at this series: 1, 3, 6, 10, 15..? What number should come next?
- a)21
- b)22
- c)20
- d)23
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Look at this series: 1, 3, 6, 10, 15..?What number should come next?a)...
3 - 1 = 2,
6 - 3 = 3,
10 - 6 = 4,
15 - 10 = 5
This question is part of UPSC exam. View all LR courses
Most Upvoted Answer
Look at this series: 1, 3, 6, 10, 15..?What number should come next?a)...
Solution:
The given series is formed by adding consecutive natural numbers. Let's see how:
1
1 + 2 = 3
1 + 2 + 3 = 6
1 + 2 + 3 + 4 = 10
1 + 2 + 3 + 4 + 5 = 15
To get the next number in the series, we need to add the next consecutive number to the previous sum. Therefore, the next number in the series would be:
1 + 2 + 3 + 4 + 5 + 6 = 21
Hence, the correct answer is option A (21).
The given series is formed by adding consecutive natural numbers. Let's see how:
1
1 + 2 = 3
1 + 2 + 3 = 6
1 + 2 + 3 + 4 = 10
1 + 2 + 3 + 4 + 5 = 15
To get the next number in the series, we need to add the next consecutive number to the previous sum. Therefore, the next number in the series would be:
1 + 2 + 3 + 4 + 5 + 6 = 21
Hence, the correct answer is option A (21).
Community Answer
Look at this series: 1, 3, 6, 10, 15..?What number should come next?a)...
1+2=3
3+3=6
6+4=10
10+5=15
15+6=21
this is the pattern
3+3=6
6+4=10
10+5=15
15+6=21
this is the pattern
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Look at this series: 1, 3, 6, 10, 15..?What number should come next?a)21b)22c)20d)23Correct answer is option 'A'. Can you explain this answer?
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