Read e-book online 100 Math Brainteasers. Arithmetic, Algebra, and Geometry PDF

By Zbigniew Romanowicz, Tom eMusic, Bartholomew Dyda

100 Math Brainteasers (Grade 7-10) is a refined collection of 100 mathematics, algebra, and geometry assignments, which successfully educate the brain in math abilities. it will likely be useful for college kids attending highschool and in addition in education for Mathematical competitions or Olympiads at a more youthful age. The assignments can both be utilized in the study room or in extracurricular actions. the joys and video games are pleasant, unique, and fixing them is much more stress-free due to the humorous illustrations.

Most of the maths difficulties don't require any unheard of mathematical skillability, yet chiefly, they problem one's creativity and talent to imagine logically. just a couple of solicit the data of algebraic expressions and principles of geometry.

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Read Online or Download 100 Math Brainteasers. Arithmetic, Algebra, and Geometry Brain Teasers, Puzzles, Games, and Problems... PDF

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Extra resources for 100 Math Brainteasers. Arithmetic, Algebra, and Geometry Brain Teasers, Puzzles, Games, and Problems...

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A ONE HUNDRED-HEADED DRAGON Once upon a time, there lived a fierce dragon, which had a hundred heads. With a stroke of his sword, the knight could cut off one, seven or 11 heads, but if at least one head remained uncut, immediately after the sword stroke, there grew back four, one, or five heads, respectively. Was the knight able to kill the dragon, then? What would be the answer if the dragon had initially had 99 heads? Remember: The dragon dies if after the sword stroke he has no more heads. 30.

PQRS square overlaps square ABCD of the same side lengths. As it turns out, the centre of square PQRS coincides with the vertex of square ABCD. Calculate the overlapping shaded area. 81. TRIANGULAR LAND An island has the shape of a triangle. Which point lies farthest from the sea? 82. ADD THE ANGLES Two segments, AC and AE, have been drawn on a gridded sheet of paper. Calculate the sum of angle BAC and angle BAE. CHAPTER 5 GAMES, LOGICAL TESTS AND OTHERS 83. ENIGMATIC GIRLS Among four girls, there are no three of the same first name, the same family name, and the same color of hair.

The winner is the person who takes out the last matchsticks, leaving his opponent with an empty box. Does the player beginning the game have the winning strategy? If so, what move should he make first? What would be the answer if the box initially contained 49 matchsticks? 100. TILES ON THE TAPE Mark and Daniel are alternately laying down domino tiles on a tape divided into 13 squares. Each tile covers exactly two squares. A tile can be placed on two empty squares; you cannot possibly put one tile on top of another.

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