# How to Do the Calculator Prediction Trick

How to Do the Calculator Prediction Trick. Your friends will think you can read minds
when you use only a calculator to guess their secret number. You will need A friend Paper A pen and a calculator. Step 1. Tell your friend to write any number on a
sheet of paper. The number can be as many digits long as they
want. Have each person in a group contribute one
digit to form a final number that you can use in the trick. Step 2. Tell your friend you will predict the final
number they will have at the end of the trick. Write the number nine on another sheet of
paper, fold the paper, and set it aside. Step 3. Have your friend scramble the digits of their
number and write it down. If the original number is 435, they might
write down 354. Have your friend write the larger of the two
numbers above the other number to avoid getting a negative total when you subtract. Step 4. Have your friend use the calculator to subtract
one number from the other. Step 5. Have your friend add the digits of the number
together until only one digit is left. Be sure that your friend uses the calculator
when doing the math calculations. This trick won’t work if the math is wrong. Step 6. Show your friend your prediction on the piece
to watch their jaws drop in amazement at your magic skills. Did you know A Greek mathematician in the
second century invented the basis of modern algebra when he began using symbols for representation
in math problems.

## 100 thoughts to “How to Do the Calculator Prediction Trick”

i dont get it

2. Emmett says:

@bee5120 π ….

3. TheElectricDreamer93 says:

Umm,it didn't work.

4. Michael Sargent says:

lmao has anyone noticed that that's the same guy? he knew the number already

5. nefavela says:

@Clubpenguinnews8 yes he has me

6. nefavela says:

wtf too complicated

7. Jay Em says:

vin diesels hairy cousin haha

8. MatiMaster says:

@bigguy7878

algebra is delicious, geometry sucks D:.

9. Shago Frederickson says:

if you need a friend then how come that dude did both papers?

10. TheAeeproductions says:

@bigguy7878 whos great ideaa was it to put letters in math?

11. OnTheLine35 says:

well if i wrote 444 it wouldn't be true -.-

Just try any 2 digit number and do not use multiples as ten such as 10 20 30 40 50 60 70 80 90. I tested it twice and i won!!!

13. Keff Molly says:

Eric Surf 6 did this before, I think.

14. CloudyLight786 says:

@kroasana lol

15. EndlesssWaltz says:

Where can I buy a friend o:?

16. Eddy says:

@anticorncob6 we would have neve gone to the moon? how come the summerians the first civilization on the planet, knew about the solar system , and how many planets were in our solar system. we couldn't predict eclipses, how did the mayans predict eclipses 50 years before they happen?and about the population , instead of population it must be the depopulation becuz thats what our governments doing, with all the earthquakes around the world, with their HAARP project. Search everything i said

17. enesog says:

Man fuck that calculator sleazy tricks. Thats just math.
I know ho to predict a footbal match for example .
I also know how to draw the same thing you drew on a paper.

@bigguy7878 Fuck you Greek Guy Fuck you!

@kroasana Haha you fuuny wittle guy you fuuny! I'm kidding my friend said that when she saw that video too! I'm her only friend, shes a geek. Anyway, she doesn't like me cuz I'm a tomboy! She said Damn when she needed a friend sucks for her, she's in jail now for an assault, on me! π

20. Mincho Velev says:

21. BahaCrunch says:

woah my number was435 and it guessed it… thats really fucking weird.

22. Alexander Walton says:

5 ppl don't know how to subtract

23. MrUbister says:

1:16 its like he has a womans voice xD

24. Jackson Ward says:

0:01

25. sowhatevs says:

I tried to do this with my mom shes 41 and so i was like pick a number and then scramble it and she was like how and then i showed her an exaple then she put the same number and she showed me and then i showed her again i was like put the bigger one on top and she still didnt know how to do it ughh what a artard

26. Brent1 Brent2 says:

I like penguins.

He must have no friends if he has to guess his own number…

28. rabbitguyz says:

@kroasana – i'm forever alone.

29. crazycartoonfreak15 says:

it the same person

30. MisterOfTheseGuys says:

73? lol he only has two friends? π

31. Camila Valdez says:

I'm lost. 0.0

32. Teletubby Rainbow says:

@6thegfam it does.. you can scramble it to 020 which is 20
200-20=180
1+8=9
π

33. Poll David says:

34. Sarah Wood says:

@96FuckYeah Bahahahhahaahhahhahha π

35. Sarah Wood says:

So, Where can I buy this thing called a " friend"?

36. Sarah Wood says:

How does the person not understand where they are going> It's common math!!!

37. I, explorer says:

were do i get friends?

38. FreeHugs~ says:

@mastertheunknown 17.99 for a monthly plan 25.99 for half a year and 42.99 for the yearly plan

39. alan4341 says:

@96FuckYeah so what if ur ginger?

40. stav3455 says:

haha i watch howcast just for the comments π

41. queenshroom says:

@peterpiperriperreter Until only one number remains. 1 + 8 = 9.

42. AAAfansite says:

im sorry, but why the fk would anyone actually bother wanting to do this?

43. Kolin Martz says:

@bigguy7878
cuz hes Arab the oldest proof of the existance of algebra is in ancient Egypt ancient China and ancient Babylon
and the word algebra comes from the word al-jabr

44. Pan0xiK says:

this is so racist… an arab guy invented algebra…

45. David says:

WTF? did they use the same guy for both people?

46. fakergo says:

this doesnt work

47. Timothy Smith says:

doesn't work if the person picks a double digit number like 66 as it comes out as 0

48. XPrime1000 says:

49. Davidelic says:

"you will need a friend"
mm fuck this

50. MegaHolymoly says:

You need a: Friend

Wtf, this dude played this with his self?

51. Light Blue Werewolf says:

i chose 99 then it`s 99-99=0 PWND! π

52. Khxlil says:

"you'il need a friend"
what if i'm justin bieber ??,

53. The GOAT says:

too fucking complicated

54. Shawn Phelan says:

the guy clearly says 7 at the beginning if you read his lips

55. lolcloudXD says:

i got everything but a friend…

@benlaneconnor what they failed to mention is that the number must be at least a 2 digit number

57. Jonthefuzz says:

@96FuckYeah why is the comment blank i can't see anything by something that doesn't have a soul

58. FreeHugs~ says:

@mastertheunknown yea but not as good quality

59. TheKingCameron says:

i know the 1089 trick

60. MrTestrak says:

@96FuckYeah you dont have a soul

61. The Last Scoot says:

9658 dosent work. Rearrange to 98-56 = 32. 3+2=5

62. The Last Scoot says:

@rasbeaRRy 4+2 = 6

63. cuvautoofficial says:

This guy cheated.

"You will need a friend."

…It's the same guy on both sides of the table…

64. DrunkenSamurai18 says:

1:07-1:13 basically means "make sure u use a calculator cuz u know u have some dumb ass friends."

65. Jean C says:

does not work for 11, 22, 33, 44, 55, 66, 77, 88, 99

@96FuckYeah Then find Harry Potter. Β―_(γ)_/Β―

67. xroses says:

@96FuckYeah you can use mirror.

68. Sofia Bubble says:

I put "55" as my number, answer 10 O.o

69. Preston Ho says:

"you will need a friend"
Me: hits x

70. Denis Seidali says:

I`m watching Howcast only to see the top comments xD

what if the number is 55 55 – 55 is 0 0+0 is 0 -.-

72. mscherrycool1 says:

@cuvautoofficial or twins lol

73. NaNexistent says:

Step 1 Go on the streets and try to buy a friend.
Step 2 Try to play this trick with him.
Step 3 I can predict that your friend what you found is ginger.
Step 4 Success Now you have got your first friend
Did you know if you are trying to do this you are a ginger or computer nerd.

74. taiebbouderbal says:

924-249=675…6+7+8=9?so?

@xXtheoneinpurpleXx loooool

76. Conversea Ibaya says:

@cuvautoofficial twins o_o

77. Camille Velasco says:

LOL it'd be awesome if he showed the prediction upside down and the guys like LOL THATS NOT MY NUMBER DUMBASS!

78. jordan kolody says:

wow lol why are people getting confused?

79. Boudica says:

Walmart

80. Sarah Wood says:

Hmm… well i went to Walmart and asked people where i can buy a "friend," and everybody i asked just looked at me like i was crazy for some weird reason…

81. Boudica says:

Yeah…People are weird these days

82. asianboi63 says:

431-134=297… 2+9+7= 18 0.o

83. Erinn Noelle says:

I'm sorry, but F U to the algebra guy… he made my freshman year living hell!

84. omgitisavamp says:

i was thinking the same thing

85. epiczord says:

i don't have a friend *forever alone*

86. AutumnLynn says:

i tried this and it didn't work

87. sasa kolakovic says:

Outstanding clip. Youtube is wonderful for this type of thing.

My best friend used to be bullied. He stated he was about to get bigger muscle mass. I laughed at him because I didn't think he would for a second…. Then without warning he gained 40 pounds of full-strength muscle. He tried the Muscle Building Bible – look for it in Google. No one dares to intimidate him nowadays. I personally registered a few days ago. See what happens. And the mans emails are fucking interesting!

Took me a while to realize they're the same person

89. theDiYwizard says:

it says add them until you reach one number, so in your case you will do….

431-134=297…2+9+7=18…1+8=9 π

90. anticorncob6 says:

Then you did something wrong.

91. anticorncob6 says:

No F you, algebra is cool, if it "made your freshman year living hell", you're just stupid, either that or you have a bad math teacher.

92. anticorncob6 says:

You seriously think all technology around today could have been invented without algebra? Are you retarded?

93. Erinn Noelle says:

I honestly completely forgot I'd written this comment and I'm sorry if I offended you, that was not my intention. I don't care for algebra myself, but it's great that you are so passionate about it. People who are good at math make it much easier for those of us who aren't so great to focus more on what they're better at. I apologize if I offended you at all.
P.S. I actually did not have a bad teacher. I got an A in algebra, I just don't care for math.

94. anticorncob6 says:

So how was it a "living hell"?

Hey guys. Fantastic movie. My good friend used to be a flabby. He enhanced his body from 284lbs of fat to 218lbs of full-strength lean muscle mass. We thought it was magnificent! I just joined personally coz I'm attempting to get big muscles. He used the Muscle Building Bible (Look in Google)…

96. Enfermo Liguista says:

I CHOOSED 259, I SCRAMBLED IT TO 925, so 925 minus 259 equals 666! WHAT THE HELL HAPPENED!!!

97. Enfermo Liguista says:

UNLIKED!!!!!

98. Bookies408 says:

Too much math.

99. RENALDAS says:

I failed the first requirement…

100. cam says:

wish i could dislike this multiple times