[For Seniors] Challenge Your Brain with Super-Hard Quizzes! A Collection of Tough Questions That Feels Great Once You Know the Answer

Social worker / Care workermoko
My name is Moko, a mother of three who admired my mother and worked in the care industry as a care worker and as a medical social worker (MSW) in a hospital. I will be drawing on my previous experience to write mainly about caregiving. Thank you in advance.

Here’s a set of super-difficult quizzes perfect for stimulating your brain.

This time, we’ve gathered a variety of challenging quizzes that seniors can enjoy.

Packed with trivia that everyone thinks they know but actually don’t! From the secret of a camel’s eyelids to Japanese traditions, food culture, and handy everyday tips, surprising puzzles await you.

How many can you answer? Try them out for fun conversation with friends and family, or enjoy them during leisure time at a facility—challenge yourself and have fun!

[For Seniors] Challenge Your Brain with Ultra-Difficult Quizzes! A Collection of Tough Problems That Feels Great Once You Figure Out the Answers (11–20)

Why do beverages in plastic bottles have earlier best-by dates than canned beverages?

Because the taste of the canned one deteriorates faster.
Because PET bottles are light
Because air enters plastic bottles at the particle level

See the answer

Because air enters plastic bottles at the particle level

PET bottles are made of plastic and have microscopic gaps, so a tiny amount of air can enter the container at the particle level. When this trace amount of oxygen comes into contact with the beverage, it tends to accelerate deterioration, so the shelf life is set shorter than that of canned drinks. In contrast, cans are made of metal and are highly airtight, allowing almost no oxygen to enter from outside. As a result, the contents deteriorate more slowly, and the shelf life is longer. This difference is why, even for the same beverage, PET bottles have an earlier expiration date.

Raise the rankinglower

moko