Try out this next mathematical magic trick. Do the following on a piece of paper: a. write the number of days a week you would like to go out (1 to 7). b. multiply that number by 2. c. add 5. d. multiply by 50. e. if you have already had your birthday this year, add 1756 if it is 2006. (add 1757 if it is 2007, add 1758 if it is 2008, and so on). if you have not had a birthday this year, add 1755 if it is 2006. (add 1756 if it is 2007, add 1757 if it's 2008, and so on). f. finally, subtract the four digit year you were born. you should now have a three digit number. if not try again. if you have a three digit number continue with the following: the first digit of your answer is your original number (i.e. how many times you want to go out each week). the second two digits are your current age. Is it magic or is it math? Explain with equations and properties why this trick works.
Try out this next mathematical magic trick. Do the following on a piece of paper: a. write the number of days a week you would like to go out (1 to 7). b. multiply that number by 2. c. add 5. d. multiply by 50. e. if you have already had your birthday this year, add 1756 if it is 2006. (add 1757 if it is 2007, add 1758 if it is 2008, and so on). if you have not had a birthday this year, add 1755 if it is 2006. (add 1756 if it is 2007, add 1757 if it's 2008, and so on). f. finally, subtract the four digit year you were born. you should now have a three digit number. if not try again. if you have a three digit number continue with the following: the first digit of your answer is your original number (i.e. how many times you want to go out each week). the second two digits are your current age. Is it magic or is it math? Explain with equations and properties why this trick works.
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