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Monday, February 10, 2003 - 02:27 PM
Here are three math tricks that involve your age. One of them allows you to find out someone's age even if they won't tell you.Trick #1
My wife taught me this one:
Watch this: 28 (age) x 7 = 196.
196 x 1443 = 282828!
Actually, what you're doing is multiplying your age by 10101. Your age will repeat 4 times if you multiply it by 1010101. Notice the number of ones? Yep, four, hence four age repetitions.
What if you're age 9 and younger? Does this still work? Well....sort of. You get 90909, or really, 090909. To really enjoy this, though, it helps to be 10 and older. Sorry kids.
Trick #2
You should now have a number, the first digit(s) being your original number and the last two your age!
Trick #3
Here's a sneaky way to find out someone's age who won't tell you:
This is one is a slight variation of Trick #1. Still fun to do, though.
The reason this trick works because 10101 is equal to 3367*3. And multiplying any two-digit number by 10101 is the same as writing it three times (e.g. 282828). Thus, when a number is multiplied by 3367, then by 3, it is really being multiplied by 10101. And of course, when you divide it by 10101 at the end of the trick, you get your original number, in this case your age.
My wife taught me this one:
- multiply your age by 7
- now multiply that product by 1443
Watch this: 28 (age) x 7 = 196.
196 x 1443 = 282828!
Actually, what you're doing is multiplying your age by 10101. Your age will repeat 4 times if you multiply it by 1010101. Notice the number of ones? Yep, four, hence four age repetitions.
What if you're age 9 and younger? Does this still work? Well....sort of. You get 90909, or really, 090909. To really enjoy this, though, it helps to be 10 and older. Sorry kids.
Trick #2
- Pick a number, any number
- Multiply this number by 2
- Add 5
- Multiply it by 50
- If you have already had your birthday this year add 1753. If you haven't, add 1752. (each year these numbers increase by 1. In 2004, you'd add 1754 if you already had your bithday and 1753 if you haven't)
- Subtract the 4 digit year that you were born.
You should now have a number, the first digit(s) being your original number and the last two your age!
Trick #3
Here's a sneaky way to find out someone's age who won't tell you:
- Ask the person to multiply the first number of his or her age by 5
- Tell them to add 3
- Now tell them to double this figure
- Have the person add the second number of his or her age to the figure and have them tell you their answer
- Deduct 6 and you will have their age!
This is one is a slight variation of Trick #1. Still fun to do, though.
- Tell someone to secretly input their age into a calculator and multiply it by 3367.
- Now, tell them to multiply it by 3.
- Next, tell them to write down their answer on a piece of paper and to clear all the information on the calculator so far.
- Now, use that number on the piece of paper and divide it by 10101.
The reason this trick works because 10101 is equal to 3367*3. And multiplying any two-digit number by 10101 is the same as writing it three times (e.g. 282828). Thus, when a number is multiplied by 3367, then by 3, it is really being multiplied by 10101. And of course, when you divide it by 10101 at the end of the trick, you get your original number, in this case your age.
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Comments
trick # 3 does not work for all ages, should the step "Have the person add the second number of his or her age to the figure" be left out, here would be the results(they should still tell their result):
with the extra step: 15 x 5 = 75;
75 + 3 = 78;
78 x 2 = 156;
156 + 5 = 161;
deduct 6, can't do it because 1 is not equal to 6
without extra step : 15 x 5 = 75;
75 + 3 = 78;
78 x 2 = 156;
deduct 6 = 15
this whole thing works with numbers that end in zero: 10 x 5 = 50;
50 + 3 = 53;
53 x 2 = 106;
second digit of age: 106 + 0 = 106;
deduct 6 = 10
or even without it: 10 x 5 = 50;
50 + 3 = 53;
53 x 2 = 106;
deduct 6 = 10
or maybe i am misunderstanding something???
I think you misunderstood step 1 -- multiply the FIRST DIGIT of the person's age. You multiplied 15 by 5. If the person's age is 15, you multiply 1 by 5 (ie, the first digit), not 15. Try that and it should all make sense.
I really like tirck #1. How your age comes out to three.
55
110
115
5750
3997
2008
first, i started with 55, second i am not 8. whats wrong?
it was a reply for the trick 2, i accidently pressed the reply to instead.
trick 2 is correct,
(u made a mistake!)
55
110
115
5750
1754 (where did u get 3997 from?)
7504
1980
5524=55 original no,+24 age(correct!)
yeah actually you are... you should read a little better: It says multiply the FIRST digit of your age by 5, not the whole age
age: x y as in x and y digits.
2(x5+3) +y = 10x +y +6. x is shifted by 10 to be in the right base10. then just remove the offset of 6.
What's interesting is that if you mess up on the first step and multiply the entire number by 5, you just have to add a step at the end of dropping the ones digit and it will still work.
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