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Daily Mental Sharpener - October 20, 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.

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1. Find the missing number: 3, 6, 11, 18, 27, __ *
2. All chefs are cooks. Some bakers are chefs. Which of these must be true? *
3. You face east. Turn 90° to your left, then turn 180°, then turn 90° to your left again. Which direction are you facing now? *
4. A café sells croissants in boxes of 6 for $15, or single croissants for $3 each. What is the cheapest way to buy exactly 15 croissants, and how much does it cost? *
5. Find the missing number: 3, 4, 8, 7, 14, 13, __ *
6. Six friends — Felix, Gia, Hank, Ivy, Jun, Kara — line up in some order. Felix is first. Hank stands somewhere behind Felix. Gia stands somewhere between Hank and Ivy. Ivy stands right in front of Jun. Kara stands somewhere behind Jun. Who stands fourth? *
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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