To get other numbers you need to combine 2 number 4, to make a “44″…

10 = (44 – 4)/4

Im guessing that you will also use a square root funcion, which to my opnion shouldn’t be right, because if you are using a square root you would need a number 2 indicating that it is square……..

The really challenging part would be doing it without a square root….(i’m not even sure if it could be done)

i think 9 is one answer: 99+(9/9)=100, but another a little bit more complicated is this one (7+7)*(7+7^-1), that became (14)*(7+ 1/7)–>98+2—->100, i used 7 because nobody else used that number, but i think there are plenty of possible answers

Daniel| Guest August 10th, 2007 - 9:48 amFive. (5 + 5) x (5 + 5) = 10 x 10 = 100

Sal| Guest August 10th, 2007 - 10:06 am99 + 9/9 =100

Jonathan Pantiesbrough| Guest August 10th, 2007 - 10:18 amThe number 5. 55+55-5-5=100.

John Lewis Highsmith| Guest August 10th, 2007 - 11:20 amThe digit is 9. Do you digit?

Slavco| Guest August 10th, 2007 - 12:34 pmI think it is number 4:

0 = 4+4-4-4

1 = (4+4)/(4+4)

2 = (4*4)/(4+4)

3 = (4+4+4)/4

4 = 4+[(4-4)/4]

5 = [(4*4)+4]/4

6 = 4+[(4+4)/4]

7 = (4+4)-(4/4)

8 = [(4+4)*4]/4

9 = (4+4)+(4/4)

….

Slavco| Guest August 10th, 2007 - 1:40 pmTo get other numbers you need to combine 2 number 4, to make a “44″…

10 = (44 – 4)/4

Im guessing that you will also use a square root funcion, which to my opnion shouldn’t be right, because if you are using a square root you would need a number 2 indicating that it is square……..

The really challenging part would be doing it without a square root….(i’m not even sure if it could be done)

Mark W| Guest August 10th, 2007 - 2:53 pmwell… it’s not adding, but 99/.99=100

as does 88/.88=77/.77=…..=22/.22=11/.11=100

James D. Turner| Guest August 10th, 2007 - 4:48 pmQues. do powers count! If not then:

5^4/5 -5*5 = 100

Dan Harris| Guest August 10th, 2007 - 6:11 pm[(5x5)-5] x 5

or

P + P + P + P in base 25 or higher, if you absolutely need it to be “addition.”

Scott K| Guest August 10th, 2007 - 7:09 pm9: 99 and 9/9ths

J Tanedo| Guest August 10th, 2007 - 10:38 pmdo they have to be whole numbers? (55 – 5) / .5 , i know its probably not it, but meh

J Tanedo| Guest August 10th, 2007 - 10:42 pmoh, nvm, [(5 * 5) - 5] * 5

Ian| Guest August 11th, 2007 - 12:21 pm4

4!x4+square route of 4+ square route of 4

\

(4x3x2x1)

deejam| Guest August 11th, 2007 - 12:56 pmanswers : 1+2+3+4+(5*5)+(5*5)+6+7+8+9+10

RK| Profile August 13th, 2007 - 1:15 pmseveral good answers are up

suineg| Guest August 23rd, 2007 - 1:06 pmi think 9 is one answer: 99+(9/9)=100, but another a little bit more complicated is this one (7+7)*(7+7^-1), that became (14)*(7+ 1/7)–>98+2—->100, i used 7 because nobody else used that number, but i think there are plenty of possible answers

Sanjay| Guest September 3rd, 2007 - 9:28 pmI’m guessing the question has a play on words, so the answer is 5:

5 is a digit, arranged like this: 5+5+5+5+5 (or 5×5).

And if used 4 times: (5 x 5) x 4

adds up to 100 (25 + 25 + 25 + 25)

Just my thoughts