you can use +, -, x, dividing, roots, !, decimal points, powers, 99, and parenthesis.
help me?
2006-09-01 16:11:59 · 6 answers · asked by xxsnsxx@verizon.net 2 in Science & Mathematics ➔ Mathematics
1 = 9/9
2 = (9 + 9)/9
3 = sqrt 9 + sqrt 9 - sqrt 9
4 = 9/9 + sqrt 9
5 = (sqrt 9)! - 9/9
6 = (sqrt 9) * (sqrt 9) - sqrt 9
7 = (sqrt 9)! - 9/9
8 = 9 - 9/9
9 = 9 * 9 / 9
10 = 9 + 9/9
11 = 99/9
12 = sqrt (9 * 9) + sqrt 9
13 =
14 =
15 = 9 + 9 - sqrt 9
16 =
17 =
18 = 9 + sqrt 9 * sqrt 9
19 =
20 = (9 + 9) / .9
21 = 9 + 9 + sqrt 9
22 =
23 =
24 = (sqrt 9 + 9/9)!
25 =
2006-09-01 17:08:33 · answer #1 · answered by dutch_prof 4 · 1⤊ 0⤋
I assume you mean that you can only use three 9's and no other numbers.... Just using trial and error...
99/9 = 11
(9/9)*9 = 9
(9 + 9) / 9 = 2
9 + 9 - 9 = 9 (already have 9 from above)
sqrt(9) + 9 + 9 = 3 + 18 = 21
sqrt(9) + sqrt(9) + 9 = 15
(9 / sqrt(9) ) + 9 = 3 + 9 = 12
(9 / sqrt(9) ) + sqrt(9) = 3 + 3 = 6
sqrt(9) + sqrt(9) - sqrt(9) = 3 + 3 - 3 = 3
(9 + 9)/.9 = 18/.9 = 20
9/0.9 + 9 = 10 + 9 = 19
9/0.9 - 9 = 10 - 9 = 1
So far we have 1, 2, 3, 6, 9, 11, 12, 15, 19, 20, and 21.
I'm sure there are many more possibilities, and I would guess that there are ways to get all the numbers from 1 to 25, but that would take a lot of work. Good luck to you.
2006-09-01 23:30:55 · answer #2 · answered by www.tutor-homework.com 3 · 0⤊ 0⤋
(9+9)/9 = 2
9-9+sqrt(9) = 3
9+9-9 = 9
9+9/9 =10
99/9 =11
etc....
2006-09-01 23:30:20 · answer #3 · answered by phantom_man17 4 · 0⤊ 0⤋
lets see now
1 9/.9-9
2 (9+9)/9
3 (sqrt9)-(sqrt9)+(sqrt9)
4 2(9+9)/9
5 (sqrt9)+(9^0)+(9^0)
6 2(sqrt9)-2(sqrt9)+2(sqrt9)
7 (9^1)-(9^0)-(9^0)
8 9-(9^0)-(0^9)
9 9-9+9
10 9/9+9
11 99/9
12 4(sqrt9)-4(sqrt9)+4(sqrt9)
13 9+(9^0)+(sqrt9)
14 9+2(sqrt9)-(9^0)
15 5(sqrt9)-5(sqrt9)+5(sqrt9)
16 4(sqrt9)+(sqrt9)+(9^0)
17 (9^1)+(9^1)-(9^0)
18 6(sqrt9)-6(sqrt9)+6(sqrt9)
19 9+9+(9^1)
20 6(sqrt9)+(9^0)+(9^0)
21 7(sqrt9)-7(sqrt9)+7(sqrt9)
22 2(sqrt9)-(sqrt9)+19
23 7(sqrt9)+(9^0)+(9^0)
24 8(sqrt9)-8(sqrt9)+8(sqrt9)
25 8(sqrt9)+(9^0)+(0^9)
There that should be all 25 and all solutions have 3 "9"s in them
2006-09-01 23:27:13 · answer #4 · answered by Tom 2 · 1⤊ 0⤋
oh my, just suggesting - give the 10 points to tom cause hes a genius
2006-09-02 00:05:20 · answer #5 · answered by Michelle 4 · 0⤊ 0⤋
erm. 9+9-9?
2006-09-01 23:17:51 · answer #6 · answered by Forest_aude 3 · 0⤊ 0⤋