Question:
What is the missing number in the following sequence? 8, 15, 28, 53, __
What is the missing number in the following sequence? 8, 15, 28, 53, __
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Look for "double and subtract" patterns if the sequence grows almost, but not quite, twice as fast each step.
Updated On: Jul 3, 2026
- 101
- 102
- 199
- 103
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The Correct Option is B
Solution and Explanation
Step 1: Concept
The pattern involves multiplying the previous term by 2 and then subtracting a value that increases by 1 each step.
Step 2: Meaning
We apply the logic: $(8 \times 2) - 1 = 15$; $(15 \times 2) - 2 = 28$; $(28 \times 2) - 3 = 53$.
Step 3: Analysis
Following the sequence of subtractions ($1, 2, 3$), the next operation should be multiplying by 2 and subtracting 4.
Step 4: Conclusion
Calculation: $(53 \times 2) - 4 = 106 - 4 = 102$. Final Answer: (B)
The pattern involves multiplying the previous term by 2 and then subtracting a value that increases by 1 each step.
Step 2: Meaning
We apply the logic: $(8 \times 2) - 1 = 15$; $(15 \times 2) - 2 = 28$; $(28 \times 2) - 3 = 53$.
Step 3: Analysis
Following the sequence of subtractions ($1, 2, 3$), the next operation should be multiplying by 2 and subtracting 4.
Step 4: Conclusion
Calculation: $(53 \times 2) - 4 = 106 - 4 = 102$. Final Answer: (B)
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