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Tell your volunteer to pick a 4 digit number and put it into the calculator twice.
Calculator math tricks. Any 4 digit number will work for this trick. Divisible by 2 if the last digit is a multiple of 2 210. For the given number move the decimal point over by one place. Since 1001 7 11 13 1001 7 11 13 the six digit number will be divisible by 7 11 13 and the original three digit number.
This fast math trick can be used to multiply any number by 5 25 or 125 easily. Best maths tricks for fast calculation. We have to find the percentage of the number 5 of 475 follow the steps. Now have your friend select a four digit number and enter it twice into a calculator.
Rather than whip out the calculator use these simple shortcuts to do the math in your head. 475 becomes 47 5 then divide the number 47 5 by 2 we get 23 75. Hand the calculator to the volunteer and have them enter the number. Divisible by 3 if the sum of the digits is divisible by 3 522 because the digits add up to 9 which is divisible by 3.
The secret of 73 for this trick secretly write 73 on a piece of paper fold it up and give to an unsuspecting friend. For instance if your volunteer picks the number 7893 they would type 78937893 into the calculator. Learn speedy maths tricks for fast calculation addition subtraction multiplication and division these simple maths tricks will help you to quickly solve maths problems and ace in maths exams.
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