1. Funny Calculator Trick
1. Take a calculator
2. Type in “12345679” (remember not 8)
3. Times it by any number multiplied by 9,
Lets say if you want 5 as answer, 59=45, so 1234567945=?
Try multiplying by: 9, 18, 27, 36 and so on…and see the magic of maths.
2. Age Calculation Tricks
Step1: Multiply the first number of the age by 5. (If <10, ex 5, consider it as 05. If it is >100, ex: 102, then take 10 as the first digit, 2 as the second one.)
Step2: Add 3 to the result.
Step3: Double the answer.
Step4: Add the second digit of the number with the result.
Step5: Subtract 6 from it.
That is your age.
3. “Got Your Number” Calculator Trick
Have someone type in any number between 1 and 900 into the calculator without letting you know what it is. (Actually, this trick will work for numbers greater than 900, but on most calculators the resulting display will not be large enough). Also, tell him to choose a number with mixed digits and it should be a positive number.
Next, you will have him perform the following calculations……on the calculator, of course:
1. Multiply his number by 3.
2. Then multiply the result by 7.
3. Then multiply the result by 37.
4. Then multiply the result by 11.
5. Finally, multiply the result by 13.
Now ask him to show you the number showing in the calculator.
OK, now here’s the magic! By looking at this number, you will be able to reveal the number he started with. For example, let’s say the random three digit number he first entered into the calculator was 763. After performing all the multiplications that you tell, he would end up with 84777693 on the display.
So, are you wondering how you come up with his starting number of 763? Good, I thought you might want to know. I’m going to explain below and with a little practice you’ll be performing this trick in no time like a true “Mathemagician!”
Here’s How It Works…..
We start the trick by multiplying by 3, 7, 37, 11, and 13. But guess what…
3 x 7 x 37 x 11 x 13 = 111,111
So really, we are just having the person multiply their original number by 111,111.
Depending on what three-digit number he choose at the start of the trick, his final number will appear in one of the following formats below. Don’t worry; I’ll explain. I’m going to do a few examples.
H S S S S S V
H S S S S V F
H H S S S V V F
H = “Head”—It will consist of one or two or no digits.
S = “Stem”—It will consist of easily identifiable REPEATING digits, always located in the centre.
V = “Variable”—It will consist of one or two or no digits.
F = “Final”—It will always consist of a single digit.
I’m going to do a few examples, so you can see exactly what’s have going on.
After you memorized the format above, here’s what to do next.
1. Subtract the “variable” V or VV from the SAME number of digits in the “stem”.
2. Subtract the difference obtained in step 1 from the entire “head” H or HH.
3. Attach the final digit to the difference you obtained in step 2. This is the number your friend used!
Example 1: Your friend chooses the number 257.
After you have got your friend to go through all of the multiplications on the calculator, his final result for this example will be 28555527.
Head: 28
Stem: 5555
Variable: 2
Final: 7
Step 1: 5—2 = 3
Step 2: 28—3 = 25
Step 3: Attach 25 to 7 to get 257.
Example 2: Your friend chooses the number 632.
After you have got your friend to go through all of the multiplications on the calculator, his final result for this example will be 70222152.
Head: 70
Stem: 222
Variable: 15
Final: 2
Step 1: 22—15 = 7
Step 2: 70—7 = 63
Step 3: Attach 63 to 2 to get 632.
