By Serhiy Grabarchuk
This selection of multiple hundred unique and hugely refined puzzles provides demanding situations that require inventive, “outside of the field” considering. many differing kinds of puzzles are integrated, similar to observe, quantity, logical, visible, spatial, dissection, dividing, dot-connecting, matchstick, coin, and extra. each one aesthetically beautiful puzzle is designed to enhance challenge fixing abilities; teach geometric, combinatorial, and spatial mind's eye; bolster visible conception and logical reasoning; and foster the improvement of a perseverant and self-confident method of demanding situations
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Additional resources for The Simple Book of Not-So-Simple Puzzles
To perform a ﬂipping move, choose a coin, ﬂip it over, then move it to another position where it touches two unmoved coins. Can you prove whether it is possible or not to achieve the goal? Solution on page 96. 381 The phone number starts with 4 and ends with 1. It has an unusual property: when all the remaining digits but one are revealed it is possible to determine the missing digit, whatever its position is. In this case the seventh digit of the phone number is not revealed. What is this missing digit, if you know that it is not 5?
The triangles cannot be cut or self-overlapped. Solution on page 101. 54 Around the Table A family is sitting around the table. Two family members’ names are already shown. Can you complete the names of the two other relatives, replacing the question marks with the appropriate letters? ) Solution on page 102. The Three I’s Six pieces are arranged to form three i’s. Move the least number of pieces to form exactly: (a) four i’s; (b) ﬁve i’s; (c) six i’s. All i’s should have the same shape and size.
Move three matchsticks to form a shape divided into exactly three congruent parts. Move four matchsticks to form a shape divided into exactly four congruent parts. Solution on page 80. DigitCount ? What digit should replace the question mark? Solution on page 80. 29 The Book Staircase Add two straight lines to the books so that you can see some additional books similar to those shown. Solution on page 80. Two Different Triangles The coin shape consists of two triangles. One of them, formed of “heads-up” coins, is equilateral, while another, formed of “tails-up” coins, is isosceles.
The Simple Book of Not-So-Simple Puzzles by Serhiy Grabarchuk