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?

Show the answer »

123 – 45 – 67 + 89 = 100

Posted in Brain Teasers

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

yodesmane says
March 5, 2020 @ 11:41

123 – 45 – 67 + 89 = 100

Ahnaf Ishiq says
March 27, 2020 @ 06:29

123 – 45 -67 + 89 = 100
(1×23)-4+5-6-7+89=100
(1-2+3-4+5)×6-7+89=100
78+9+6+5-4+3+2+1=100
(56-34-12)×(9+8-7)=100

Ahnaf Ishiq says
March 27, 2020 @ 06:30

1+2+3+4+5+6+7+8×9=100

Grace Knaf says
April 13, 2020 @ 10:20

@Dan
dont need that negativity, they are just trying to help (they were actually helpful to me)
who else is here in 2020 quarantine?
also found another solution:1*2*3*4+5+6+7*8+9=100

Dan says
April 14, 2020 @ 08:35

Now now Grace, let’s be positive :)

uuuuuuu says
April 14, 2020 @ 13:40

why

Tubz says
April 18, 2020 @ 16:18

Have got it using all single digits
1+2+3+4+5+6+7+8×9
Using a 2 digit number
1+2+3-4+5+6+78+9=100
Using a 3 digit number
123-4-5-6-7+8-9=100
Anyone find a way using a 4 digit number??

Sarah says
April 21, 2020 @ 21:25

Amazing riddle

hiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii says
May 19, 2020 @ 16:31

soooooo who is here in 2020 quarentine teehee covid- 19 CoRoNa Time

Siddhant says
August 5, 2020 @ 03:22

Using digits 1to 9 in ascending order and using sign +,- maximum 3 times in total find a equation = 100

lulu says
October 26, 2020 @ 08:16

123 45 67 89 100

Idk says
November 2, 2020 @ 05:20

1+2+3+4+5+6+7+8+9 = 123456789

O <
\__/

Tulip says
December 15, 2020 @ 04:00