Logic & Deduction
1 / 15What comes next in this sequence? 2, 6, 18, 54, ___
About Logic & Deduction
Put on your thinking cap! Use the clues to figure out the answer in these logic and deduction puzzles that test your reasoning skills! This free memory games activity is built for older adults who want clear, readable browser-based games without sign-up friction.
Memory games support focus, short-term recall, and pattern recognition with visual and logic-based challenges. This quiz includes 15 questions, so it works well as a quick session or as part of a longer brain-training routine. A printable version is available if you prefer offline play or want to share the game at home, in a classroom, or in a group setting.
About Logic & Deduction
Logic & Deduction is a free memory games quiz with 15 multiple-choice questions with a mix of 5 easy, 5 medium, 5 hard questions. Put on your thinking cap! Use the clues to figure out the answer in these logic and deduction puzzles that test your reasoning skills! A typical run takes about 7 minutes, hints are always one tap away, and your streak ticks up the first time you finish a game on a given day.
A few sample questions
1. Tom is taller than Sue. Sue is taller than Mike. Who is the shortest?
Answer: Mike
Since Tom is taller than Sue, and Sue is taller than Mike, Mike must be the shortest of the three.
2. A farmer has chickens and cows. He counts 8 heads and 22 legs in total. How many cows does he have?
Answer: 3
8 heads means 8 animals total. If all 8 were chickens, that would be 16 legs. Each cow adds 2 extra legs (4 instead of 2). We need 22 - 16 = 6 extra legs, so 6 ÷ 2 = 3 cows (and 5 chickens). Check: 3 × 4 + 5 × 2 = 12 + 10 = 22 legs.
3. What comes next in this sequence? 2, 6, 18, 54, ___
Answer: 162
Each number is multiplied by 3 to get the next: 2 × 3 = 6, 6 × 3 = 18, 18 × 3 = 54, so 54 × 3 = 162.
Frequently asked questions
How many questions are in Logic & Deduction?
Logic & Deduction has 15 multiple-choice questions. Each one has four answer options and an explanation that appears after you answer, so you learn something even when you miss.
Is Logic & Deduction free to play?
Yes. The entire SeniorBrainGames catalog — including Logic & Deduction — is free, with no sign-up required, no time limits, and no ads on top of the game. It also works offline once the page has loaded once.
How long does Logic & Deduction take?
Most players finish Logic & Deduction in about 7 minutes. You can pause between questions, replay it as often as you like, and there is no penalty for taking your time — answers are explained after you submit them.
What's a good follow-up after Logic & Deduction?
If you enjoyed this memory games quiz, try the Daily Challenge — five rotating questions, refreshed every 24 hours, that count toward your streak. You can also use the Surprise Me button on the homepage to land on a different game type for variety.
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