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1 2 3 4 5 6 7 8 9 = 100

This equation is incomplete: 1 2 3 4 5 6 7 8 9 = 100

One way to make it accurate is by adding seven plus and minus signs, like so.

1 + 2 + 3 – 4 + 5 + 6 + 78 + 9 = 100

How can you do it using only 3 plus or minus signs?

123 – 45 – 67 + 89 = 100


Posted in Brain Teasers

 

12 Comments on "1 2 3 4 5 6 7 8 9 = 100"


Jessica says
April 7, 2015 @ 09:34

That is very clever


Tamoshi says
April 8, 2015 @ 00:48

123-45-67+89=100
^_^


Jackie says
September 27, 2016 @ 22:50

Idk that’s how


Akshat says
November 19, 2016 @ 00:10

1+2+3+4+5+6+7+8×9=100


Niyibizi says
December 7, 2016 @ 13:31

this require a person with above 100 IQ


iko says
January 10, 2017 @ 12:35

1 2 3 4 5 6 7 8 9=50
?


Yared Genene says
April 19, 2017 @ 03:45

1*2+3*4*5-6+7+8-9=100


Laquanda says
August 17, 2017 @ 18:08

1+2+3+4+5+6+7+8×9=100


Sjörk says
October 24, 2017 @ 05:24

1+2+3+4+5+6+7+8×9=100


Dan says
October 24, 2017 @ 12:22

@Yared Genene That’s 62.

Thanks to Laquanda and Sjörk, but the riddle asked how you could use only 3 plus or minus signs.


iPhone 5 says
December 13, 2018 @ 10:40

52+39+6-8+7+4×1=100


JENEEFUN says
February 27, 2019 @ 01:14

1 x [ (2×9) + (3×8) + (4×7) + (5×6) ] = 100


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