Go back
Math trick

Math trick

Posers and Puzzles

PG
Disavowed

Seattle, WA

Joined
07 Jan 02
Moves
20517
Clock
04 Sep 03
Vote Up
Vote Down

1. First of all, pick a number between 1 and 10.


2. Multiply this number by 2.


3. Add 5.


4. Multiply it by 50 - I'll wait while you get the calculator................


5. If you've already had your birthday this year add 1753.
If you haven't, add 1752.


6. Now subtract the four digit year that you were born.


You should have a three digit number.


The first digit of this is the one you started with.


The next two numbers are.....



YOUR AGE!

I think I;ve figured out how the age part gets worked into the result, but I'm still trying to figure out how your original number is worked in as well. I'll post tomorrow night what I've figured out and see if it matches any of your answers.

F
Artist in Drawing

in your fridge

Joined
21 May 03
Moves
9766
Clock
04 Sep 03
Vote Up
Vote Down

1. First of all, pick a number between 1 and 10.
>n

2. Multiply this number by 2.
>2n

3. Add 5.
>2n+5

4. Multiply it by 50 - I'll wait while you get the calculator................
>100n+250

5. If you've already had your birthday this year add 1753.
If you haven't, add 1752.
>100n+2003

6. Now subtract the four digit year that you were born.
>100n+age

T
Kupikupopo!

Out of my mind

Joined
25 Oct 02
Moves
20443
Clock
04 Sep 03
Vote Up
Vote Down

Originally posted by Fiathahel
1. First of all, pick a number between 1 and 10.
>n

2. Multiply this number by 2.
>2n

3. Add 5.
>2n+5

4. Multiply it by 50 - I'll wait while you get the calculator................
>100n+250

5. If you've already had your birthday this year add 1753.
If you haven't, add 1752.
>100n+2003

6. Now subtract the four digit year that you were born.
>100n+age

You disappoint me with your incomplete explenation :-p In step 5 there are two possibilities...

BarefootChessPlayer
Barefoot Chessplayer

central usa

Joined
22 Jul 03
Moves
63080
Clock
24 Nov 03
Vote Up
Vote Down

this does not work if your age is over 100!
i always heard this as "the number of times you want to dine out in a week (between one and ten)".
the "fudge factor" (1753 or 1752) is simply the current year minus 250 if you've had your birthday already or current year minus 251 if you haven't.
it thus will work for any year (until you become a centenarian) as long as you use the right fudge factor.
i used to know others like this; will see if i can find or recall them.

T

Joined
20 Apr 05
Moves
228
Clock
30 Apr 05
Vote Up
Vote Down

try this.
1.)pick a multiple of 9, ex. 18 36
2.)add the two digits.
3.) subtract 5 from the number u get.
4.)Count in the alphabet how ever many numbers you got. ex 1=a, 2=b etc.
5.)pick a country that starts with the letter you got.
6.)pick an animal that starts with the second letter of the country you picked.

How many of you are riding an elephant in Denmark?

a
Enola Straight

mouse mouse mouse

Joined
16 Jan 05
Moves
12804
Clock
30 Apr 05
Vote Up
Vote Down

Originally posted by TrollGirl28
try this.
1.)pick a multiple of 9, ex. 18 36
2.)add the two digits.
3.) subtract 5 from the number u get.
4.)Count in the alphabet how ever many numbers you got. ex 1=a, 2=b etc.
5.)pick a country that starts with the letter you got.
6.)pick an animal that starts with the second letter of the country you picked.

How many of you are riding an elephant in Denmark?
I am, but not from following those steps. *uncomfortable silence* Uh, so, yeah...

B
Non-Subscriber

RHP IQ

Joined
17 Mar 05
Moves
1345
Clock
30 Apr 05
1 edit
Vote Up
Vote Down

It doesn't work.

I wonder if you copied that from a two-year-old source...?

TP
Leak-Proof

under the sink

Joined
08 Aug 04
Moves
12493
Clock
30 Apr 05
Vote Up
Vote Down

Originally posted by TrollGirl28
try this.
1.)pick a multiple of 9, ex. 18 36
2.)add the two digits.
3.) subtract 5 from the number u get.
4.)Count in the alphabet how ever many numbers you got. ex 1=a, 2=b etc.
5.)pick a country that starts with the letter you got.
6.)pick an animal that starts with the second letter of the country you picked.

How many of you are riding an elephant in Denmark?
An alternate that takes it a little further.....

6) Pick an animal that starts with the last letter of the country you picked.
7) Pick a color that starts with the last letter of the animal you picked.

You should have an orange kangaroo in Denmark....

T

Joined
20 Apr 05
Moves
228
Clock
02 May 05
Vote Up
Vote Down

Originally posted by Bowmann
It doesn't work.

I wonder if you copied that from a two-year-old source...?
Sorry!
My math teacher told us that a while ago and I guess I didn't do it right.

B
Non-Subscriber

RHP IQ

Joined
17 Mar 05
Moves
1345
Clock
02 May 05
Vote Up
Vote Down

Originally posted by TrollGirl28
Sorry!
My math teacher told us that a while ago and I guess I didn't do it right.
I meant the "trick" posted initially.

B
Non-Subscriber

RHP IQ

Joined
17 Mar 05
Moves
1345
Clock
02 May 05
Vote Up
Vote Down

Originally posted by TrollGirl28
try this.
1.)pick a multiple of 9, ex. 18 36
2.)add the two digits.
3.) subtract 5 from the number u get.
4.)Count in the alphabet how ever many numbers you got. ex 1=a, 2=b etc.
5.)pick a country that starts with the letter you got.
6.)pick an animal that starts with the second letter of the country you picked.

How many of you are riding an elephant in Denmark?
No. An emu in Djibouti.

P
Bananarama

False berry

Joined
14 Feb 04
Moves
28719
Clock
02 May 05
Vote Up
Vote Down

Originally posted by Bowmann
No. An emu in Djibouti.
Aha! Hoisted on your own petard. You should have been riding a jackalope in Djibouti. Or Katie B. from Jakalope, either one.

B
Non-Subscriber

RHP IQ

Joined
17 Mar 05
Moves
1345
Clock
02 May 05
Vote Up
Vote Down

Originally posted by PBE6
Aha! Hoisted on your own petard. You should have been riding a jackalope in Djibouti. Or Katie B. from Jakalope, either one.
You're quite right. Although I'm sure an emu would be easier.

On second thoughts, perhaps Katie B. would.

iamatiger

Joined
26 Apr 03
Moves
26771
Clock
02 May 05
1 edit
Vote Up
Vote Down

I'm riding an oryx in Morocco!

P
Bananarama

False berry

Joined
14 Feb 04
Moves
28719
Clock
03 May 05
Vote Up
Vote Down

Originally posted by Bowmann
You're quite right. Although I'm sure an emu would be easier.

On second thoughts, perhaps Katie B. would.
You can grab both by the ears, although one is cuter. I won't say which!
😲

Cookies help us deliver our Services. By using our Services or clicking I agree, you agree to our use of cookies. Learn More.