Download Mathematical Fun, Games and Puzzles by Jack Frohlichstein PDF

By Jack Frohlichstein

This enjoyable textual content, built via a math instructor, makes use of puzzles and video games to introduce the fundamental principles and operations of mathematics. Following the traditional heart college curriculum, the publication offers 418 difficulties and a hundred and twenty illustrations that cover a variety of subject matters: averages, fractions, decimals, chances, powers, roots, and extra. Puzzles variety from effortless to tough.

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Extra resources for Mathematical Fun, Games and Puzzles

Sample text

Student's number Student gives another number Teacher says, "Now it's my turn" Student's number Teacher's number 21,343 59,268 40,731 64,999 35,000 221,341 The teacher gives this answer right away, pretending to have added the numbers very quickly. He tries another example: Student's llUmber 611 Student's number 517 Teacher's number 388 Student's number 135 Teacher's number 482 Student's number 876 Teacher's number 864 Student's number 982 Teacher's number 123 Teacher's spontaneous answer 4,978 How can the teacher do this?

Two men in the Army had a potato-peeling contest to see who could peel the most potatoes in a given time. One peeled two hundred thirty-six potatoes, and the other peeled three hundred and won. How many potatoes did both peel altogether? ) (b) If you have twenty (six or sick) sheep, and one dies, how many are left? ) 28 MATHEMATICAL FUN, GAMES AND PUZZLES 43. Here is a fast-disappearing word. It has nine letters. If you take away six letters, only one will be left. What is the word? 44. Three men entered a hotel and asked for a room, but the clerk said there was only one room available but that he would put dividers in the room.

C. D. Write three high digits in a line Reverse the digits Subtract B from A Reverse them again and add 846 648 198 891 I, °8 9 On high numbers, the answer will always be 1,089 no matter what three digits you take. In step C, always subtract the smaller number from the larger; also, when subtracting, you must always have three digits in the answer - otherwise the process will not work and your answer will be 198 instead of 1,089. 554 455 9 9 9 9 198 If the numbers are the same when reversed, your answer will be 0.

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