[For Seniors] Think and Have Fun: Introducing Brain-Stimulating Logic Puzzles
This time, we’re introducing logic puzzles designed for older adults.
A logic puzzle is one where you think about why something happens or consider the methods and steps involved.
Making use of your own knowledge and finding hints or trick points in the problem statement are key to solving the puzzles.
Thoughtfully working through logic puzzles helps activate the brain and can also improve concentration and creativity.
Why not incorporate them into quiz activities at senior care facilities? We’ve prepared everything from shorter puzzles with fewer clues in the text to longer ones with more to read.
Try using paper or a whiteboard to make things clearer with drawings and diagrams, and offer hints as needed to make it engaging!
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[For Seniors] Think and Have Fun: Introducing Brain-Stimulating Logic Puzzles (11–20)
Taro made his girlfriend Hanako drink a poisoned beverage and killed her, making it look like a suicide. Taro thought he was safe because he wiped off all the fingerprints, but the police quickly realized it was a homicide. Why was that?
Because he even wiped off Hanako’s fingerprints from the glass or bottle that had contained the drink. If Hanako had attempted suicide, her fingerprints should have been on the glass or bottle. Taro, trying to avoid suspicion, went out of his way to wipe off all the fingerprints, but it seems that backfired on him.
A child said they wanted to paint a picture of the sky and the sea, so the mother took paints and a sketchbook and went to the beach with the child. However, when they arrived, they realized that the blue paint was missing. Since blue is a primary color, it can’t be made by mixing other paints. But the child said they could still paint the sea and sky with the paints they had. Why is that?
See the answer
Because I waited until evening to paint the sea and sky at sunset. I thought I wouldn’t need blue paint for the sea and sky at that time.
There are three convenience stores between my house and the nearest train station. I usually shop at the closest one, but when I buy a certain product, I go to the convenience store farthest from my home. There’s no difference in selection or price, so why do I buy it at the farthest store?
See the answer
Because one of the items was an umbrella. It wasn’t raining when I left home and walked to the nearest station, but it was raining when I walked from the station back home. I usually shop at the convenience store closest to my house, but to avoid getting wet on the way home, I buy an umbrella at the convenience store that’s farthest from my house and closest to the station.
Two bodies were found in the snowy mountains, and one of them had a rifle. It appears that only one shot was fired from the rifle. The autopsy revealed that the two died at almost the same time, and suicide has been ruled out. Why did they die?
See the answer
Given that only one shot was fired from the rifle, that the two people died at almost the same time, and that the scene was a snowy mountain, the correct answer is: “The impact of the rifle shot triggered an avalanche, and both of them were caught in it.”
Two prisoners are locked in a single cell. There’s a window about 10 meters above the cell floor, but they can’t reach it. So the two prisoners devise an escape plan to dig a tunnel in the floor, but after digging for several days, they come up with a different plan and successfully escape. What was the plan that allowed them to escape?
See the answer
The plan was to pile up the soil dug for the tunnel on the jail cell floor, stand on the mound, and escape through the open window. By stacking the large amount of soil, they created a mound high enough to climb out of the window.
In a certain park, Taro and Hanako were playing. Taro was standing facing west, and Hanako was standing facing east. Then Taro, who was facing west, said, “There’s a butterfly perched on top of Hanako’s head right now.” Even though Taro didn’t have a mirror or anything like that, how did he know there was a butterfly perched on Hanako’s head?
See the answer
Because they were standing facing each other. In the problem, it says that Taro was facing west and Hanako was facing east, which might make you think they were standing back-to-back facing opposite directions, but in fact Taro and Hanako were standing facing each other.
[For Seniors] Think and Have Fun: Introducing Brain-Stimulating Logic Riddles (21–30)
One night, I lit ten candles indoors at the same time. A gust of wind soon blew out one. Another gust quickly blew out two more, so I closed the window. After closing it, no more candles were blown out by the wind. How many candles were left the next morning?
See the answer
I lit 10 candles at the same time, but 3 of them were blown out by the wind. After that, I closed the window, so it seems the wind no longer blew out any flames. Therefore, the remaining 7 should have burned down completely from their own flames. Thus, the answer is the 3 that were blown out by the wind earlier.