Question 17
MediumOriginal questionFind the term that comes next: 7, 10, 16, 28, 52, ?
Show the answer and explanation
CorrectNot quiteAnswer A
Correct answer: A
Explanation
Differences: 3, 6, 12, 24. They double each time.
Next difference , so the next term is .
Check with the rule : .
Worth noting
104 doubles 52 but forgets to subtract 4. 148 adds 96, which is the difference after next (48 doubled once too often).
- Concept
- Differences forming a doubling series
- Typical timeTypical
- 70 s
- Your timeYours
- —
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