Abstract

"Children are addicted to it all the time!"
"Once you start, it won't stop (laughs)"
I'm happy to hear that!

Moreover, it naturally improves observing ability, concentration ability, and thinking ability.

Of course, children, adults, uncles and aunts are also recommended.


To find the mistakes in this book,
You can't find a mistake unless you look closely
There are a lot of "super difficult" problems.

But only when you solve that "super difficult" problem
You can feel the fun and exhilaration like never before,
I also think that it will lead to confidence.

And to my delight
Also for training of observation, concentration and thinking
I'm happy to be!

On each page
Tips for finding mistakes
Helps to rejuvenate the head
I also added "a secret to becoming a genius".

Author’s Information

A management team that plans and produces difficult spot the difference and brain training games, quizzes, and content at United Corporation.