Equations that always end at 13?

[lolhammertime]

So I recently bought a gaff deck and I want to use the 13 of diamonds with math.

I'm planning to do a trick where the participant gets their age, blah blah blah (insert math here) and it should end at the number 13.

If you know any, please tell me some equations?

 

[DavidL11229]

Think of a number. Multiply it by 9. Add the digits together. If your number is more than one digit keep adding the digits until you have a one digit number. (Number 9, Number 9, Number 9.) Now add 4.

It would also seem that you can think of any multi-digit number, add the digits together and subtract that from the original number and add the digits of the new number together until you have a single digit number (Number 9, Number 9, Number 9). Now add 4.

I haven't verified that the second one always works, but it seems to and it appears to be a known thing. The first one is tried and true, but possibly too well known.

I don't think you are going to find much specific to 13, but lost of ways to get 9 (Number 9, Number 9, Number 9).

 

[Tower of Lunatic Meat]

Try this, and I apologize in advance:

'Take your age. Now add 13. That is your age in 13 years!'

Do the David Blaine stare into the camera and collect those duckets.

 

[lolhammertime]

Try this, and I apologize in advance:

'Take your age. Now add 13. That is your age in 13 years!'

Do the David Blaine stare into the camera and collect those duckets.

I was actually thinking of doing that

 

[lolhammertime]

Think of a number. Multiply it by 9. Add the digits together. If your number is more than one digit keep adding the digits until you have a one digit number. (Number 9, Number 9, Number 9.) Now add 4.

It would also seem that you can think of any multi-digit number, add the digits together and subtract that from the original number and add the digits of the new number together until you have a single digit number (Number 9, Number 9, Number 9). Now add 4.

I haven't verified that the second one always works, but it seems to and it appears to be a known thing. The first one is tried and true, but possibly too well known.

I don't think you are going to find much specific to 13, but lost of ways to get 9 (Number 9, Number 9, Number 9).

cool it actually works! thanx

 

[Scarlett12]

Think of a number. Multiply it by 9. Add the digits together. If your number is more than one digit keep adding the digits until you have a one digit number. (Number 9, Number 9, Number 9.) Now add 4.
It would also seem that you can think of any multi-digit number, add the digits together and subtract that from the original number and add the digits of the new number together until you have a single digit number (Number 9, Number 9, Number 9). Now add 4.
I haven't verified that the second one always works, but it seems to and it appears to be a known thing. The first one is tried and true, but possibly too well known.
I don't think you are going to find much specific to 13, but lost of ways to get 9 (Number 9, Number 9, Number 9).
I tried it. It is really very nice trick..
Friends must try it.

 

[lolhammertime]

Think of a number. Multiply it by 9. Add the digits together. If your number is more than one digit keep adding the digits until you have a one digit number. (Number 9, Number 9, Number 9.) Now add 4.
It would also seem that you can think of any multi-digit number, add the digits together and subtract that from the original number and add the digits of the new number together until you have a single digit number (Number 9, Number 9, Number 9). Now add 4.
I haven't verified that the second one always works, but it seems to and it appears to be a known thing. The first one is tried and true, but possibly too well known.
I don't think you are going to find much specific to 13, but lost of ways to get 9 (Number 9, Number 9, Number 9).
I tried it. It is really very nice trick..
Friends must try it.

Pssst... use the reply quote feature next time.