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Number and Letter Series · Question 17 of 68

Question 17

MediumOriginal question

Find the term that comes next: 7, 10, 16, 28, 52, ?

Options for question 17

Show the answer and explanation
CorrectNot quiteAnswer A

Correct answer: A

Explanation

  1. Differences: 3, 6, 12, 24. They double each time.

  2. Next difference =48= 48, so the next term is 52+48=10052 + 48 = 100.

  3. Check with the rule ×2−4\times 2 - 4: 52×2−4=10052 \times 2 - 4 = 100.

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 time
70 s
Your time
—
The rule this testsNumber series
Practise this chapter →

Ten questions from Number and Letter Series, at your own pace.

Practise this chapter →

Ten questions from Number and Letter Series, at your own pace.