Look at this series: 3, 4, 7, 8, 11, 12, ... What number should come next?
A. 7
B. 10
C. 14
D. 15
Answers
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The next number is 15.
Correct option: D. 15
Step-by-step explanation:
The gives sequence of numbers is
3, 4, 7, 8, 11, 12, ...
We can break the sequence into two different sequences that follows:
- 3, 7, 11, ... and
- 4, 8, 12, ...
Both the sequences are in Arithmetic Progression with common difference 4 and first terms 3 and 4 respectively.
Since the last term of the given sequence is 12 (which comes from the second sequence), then clearly the next term should come from the first sequence.
11 being the previous term, the required next term is (11 + 4) = 15
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