What is the next number in the sequence 2, 3, 5, 9, 17, ...?
Answer and explanation
Correct answer: B. 33
- Step 1: The gaps are 1, 2, 4, 8, which double each time.
- Step 2: The next gap is 16, so 17 + 16 = 33.
Answer
33.
Why not the others: 25 adds 8 again, 31 adds 14 and 34 adds 17.
Practise more Sequences, Number Puzzles and Spatial Reasoning in Words.
Free questions with an explanation for every one, and full timed 11+ Practice (England) mock tests.
More Sequences, Number Puzzles and Spatial Reasoning in Words questions
- What is the next number in the sequence 2, 4, 8, 16, ...?
- What is the next number in the sequence 100, 93, 86, 79, ...?
- What is the next number in the sequence 3, 6, 11, 18, 27, ...?
- In the Fibonacci-style sequence 1, 1, 2, 3, 5, 8, 13, ..., what is the next number?
- What is the next number in the sequence 5, 2, 9, 4, 13, 6, 17, ...?
- In each row, the third number follows the same rule from the first two numbers. Row 1: 3, 4, 11. Row 2: 5, 2, 9. Row 3: 6, 3, ?. What is the…