Puzzle 1 of 8
2, 4, 8, 16, ?
32
PUZZLES
Sequence Puzzles
Practice identifying simple numerical and symbolic rules. Look for repetition, differences, multiplication, and alternating steps.
Puzzle 2 of 8
5, 10, 15, 20, ?
25
Puzzle 3 of 8
1, 4, 9, 16, ?
25
Puzzle 4 of 8
10, 20, 40, 80, ?
160
Puzzle 5 of 8
30, 27, 24, 21, ?
18
Puzzle 6 of 8
3, 6, 11, 18, 27, ?
38
Puzzle 7 of 8
100, 90, 81, 72.9, ?
65.61
Puzzle 8 of 8
1, 1, 2, 3, 5, 8, ?
13
How to approach these puzzles
Write down what the question actually tells you before trying to solve it. For arithmetic puzzles, calculate carefully; for lateral-thinking puzzles, inspect assumptions; for word puzzles, consider both meaning and spelling.
Frequently Asked Questions
Should I look at the answer immediately?
Try to solve each puzzle first. If you get stuck, reveal the answer and study the reasoning before moving on.
Can a puzzle have more than one interpretation?
Sometimes. The intended answer should account for the clues with the fewest extra assumptions.