If you love to solve challenging puzzles and get high in solving them then you would like to have a look at my book titled 'MAGIC SQUARE PUZZLES'. I have created these puzzles and these puzzles involve both Arithmetic and Logic. Solve just one puzzle and you would have accelerated your mental calculation capabilities.
THE HINDU newspaper carried an article about me and I am giving the link for the same https://www.thehindu.com/life-and-style/leisure/multiples-of-fun/article3717368.ece
The magazine Education World had also published an article about me and you can view the same in this link https://www.educationworld.in/maths-missionary-tn-mahesh/
You can go to my website at www.magicsquarepuzzles.com and start solving the puzzle right away. My puzzles also appear daily in THE HINDU IN SCHOOL a school edition from THE HINDU group.
You can buy my book at www.amazon.com, www.amazon.in and the KDP platform. Hope these puzzles keep you engaged.
These puzzles are a new kind of puzzles, that would kindle your interest in basic arithmetic and would help you in mental mathematics.
I have created these puzzles and I teach these puzzles in several schools. The response from the student community is awesome. That is what keeps me in working on this concept all the more.