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Daily Mental Sharpener - October 21, 2026

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Eight quick puzzles — patterns, deduction, spatial reasoning, mental math, and two timed memory challenges. About 7 minutes, one point per puzzle, score out of 8. Recreational only: this is a sharpener, not an IQ verdict.

Your answers are stored with your account. If you choose anonymous participation, your identity will not be displayed with the tool response.
1. Find the missing number: 2, 3, 7, 16, 32, __ *
2. No pilots are chefs. All cooks are chefs. Which of these must be true? *
3. A cube net shows faces A–B–C–D in a row, with face E above B and face F below B. When folded into a cube, which face ends up opposite face B? *
4. A bakery makes 240 muffins a day. Three-eighths are blueberry, one-third are chocolate chip, and the rest are bran. How many bran muffins is that? *
5. In each row, the third number equals the first plus twice the second. Row 1: 3, 4, 11. Row 2: 5, 2, 9. Row 3: 6, 3, __? *
6. Five books (Atlas, Brine, Copper, Drift, Ember) sit in a row on a shelf. Copper sits left of Drift. Ember sits just right of Brine. Atlas sits at an end, not the left end. Brine sits left of Copper. Which book sits in the middle? *
7. Memory challenge *

You will have 30 seconds to study the material. It will then disappear, and you will answer a question about it.

8. Memory challenge *

You will have 45 seconds to study the material. It will then disappear, and you will answer a question about it.

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