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What should come in place of the question mark (?) in the given series? 18 24 34 40 50 ?
56
57
55
58
56
Identify the alternating addition pattern: +6, +10, +6, +10, +6. Simply add 6 to the last number.
Identify the alternating addition pattern: +6, +10, +6, +10, +6. Simply add 6 to the last number.
Analyze the differences
Calculate the difference between consecutive terms: 24-18=6, 34-24=10, 40-34=6, 50-40=10.
Identify the pattern
The differences are alternating between 6 and 10. The last difference was 10, so the next difference must be 6.
Calculate missing term
Add 6 to the last term: 50 + 6 = 56.
B: 57 does not follow the +6 pattern from 50. C: 55 is result of adding 5, which is incorrect. D: 58 is result of adding 8, which is incorrect.
A is correct because the series follows an alternating pattern of adding 6 and 10, and 50 + 6 = 56.
If a series grows slowly, always check the difference between terms first. If the differences don't reveal a simple pattern, check for alternating operations.
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