20070203, 06:19  #23  
"Richard B. Woods"
Aug 2002
Wisconsin USA
2^{2}×3×641 Posts 
Quote:
But now that I see % also proposed, I realize that they're related. Quote:
   And now I see that concatenation is just a sneaky multiplyby10(or 100 or 1000)andadd. To me, that's okay only when used to concatenate bare "4"s, as in 44, 444, or 4444 (so that its "invisibility" is restored :)). Last fiddled with by cheesehead on 20070203 at 06:21 

20070203, 06:45  #24 
"Richard B. Woods"
Aug 2002
Wisconsin USA
2^{2}·3·641 Posts 
One pointed solution:
22 = 9/.9 + 9 + √9 and some pointless ones: 43 = (((√9)!)! / (√9)! + 9) / √9 49 = ((((√9)!)! / (√9)!) / √9) + 9 52 = 9 * (√9)!  ((√9)! / √9) ((√9)!)! / (√9)! + 9 + √9 134 = (((√9)!)! / 9) + 9 * (√9)! 138 = ((√9)!)! / (√9)! + 9 + 9 147 = ((√9)!)! / (√9)! + (9 * √9) 160 = ((√9)!)! * (√9)! / (9 * √9) 174 = ((√9)!)! / (√9)! + 9 * (√9)! 200 = ((√9)!)! / (√9)! + ((√9)!)! / 9 201 = ((√9)!)! / (√9)! + 9 * 9 Last fiddled with by cheesehead on 20070203 at 07:32 
20070203, 15:38  #25 
Jan 2005
Transdniestr
503 Posts 
Up to 200
94= ?
103 = ? 106 = ? 131 = ? 133 = ? 137 = ? 139146 = ? 148 150 = ? 151 = (((sqrt(9)!)! + ((sqrt(9)!)!)/9 9 152 = ? 154 = (((sqrt(9)!)! + ((sqrt(9)!)!)/9  sqrt(9)! 155 = ? 157 = (((sqrt(9)!)! + ((sqrt(9)!)!)/9  sqrt(9) 158 = ? 163 = (((sqrt(9)!)! + ((sqrt(9)!)!)/9 + sqrt(9) 164 = ? 166 = (((sqrt(9)!)! + ((sqrt(9)!)!)/9 + sqrt(9)! 167 = ? 169 = ? 170 = ? 171 = 9*sqrt(9)! * sqrt(9) + 9 172 = 173 = 175178 = ? 179 = ((sqrt(9))!)!/9 + 99 180 = 99 + 9*9 181  185 = ? 186 = (sqrt(9)!)!/(sqrt(9)  9*(sqrt(9)! 187 = ? 188 = ? 189 = (sqrt(9)!)^sqrt(9)  9*sqrt(9) 190197 = 198 = (sqrt(9)!)^sqrt(9)  sqrt(9)!*sqrt(9) 199= ? ============================= 202205 = ? 207 = (sqrt(9)!)^sqrt(9)  sqrt(9)*sqrt(9) 208 = ? 209 = ? 210 = (sqrt(9)!)^sqrt(9)  sqrt(9)  sqrt(9) 211 = ? 212 = ? 213 = (sqrt(9)!)^sqrt(9)  9/sqrt(9) 214 = (sqrt(9)!)^sqrt(9)  sqrt(9)!/sqrt(9) 215 = (sqrt(9)!)^sqrt(9)  9/9 216 = (sqrt(9)!)^sqrt(9) + 9  9 217 = (sqrt(9)!)^sqrt(9) + 9/9 218 = (sqrt(9)!)^sqrt(9) + sqrt(9)!/sqrt(9) 219 = (sqrt(9)!)^sqrt(9) + 9/sqrt(9) 220= ? 221 = ? 222 = (sqrt(9)!)^sqrt(9) + sqrt(9) + sqrt(9) 223 = ? 224 = ? 225 = (sqrt(9)!)^sqrt(9) + sqrt(9) * sqrt(9) Last fiddled with by grandpascorpion on 20070203 at 16:08 Reason: More solutions 
20070203, 18:31  #26 
Aug 2002
Buenos Aires, Argentina
2^{2}×3×113 Posts 
141 = ((sqrt(9)!)!/sqrt(9)  99
144 = ((9 + sqrt(9))*(9 + sqrt(9)) 204 = ((sqrt(9)!)!/sqrt(9)  sqrt(9)! * sqrt(9)! 228 = ((sqrt(9)!)!/sqrt(9)  9  sqrt(9) 231 = ((sqrt(9)!)!/sqrt(9)  sqrt(9)  sqrt(9)! 234 = ((sqrt(9)!)!/sqrt(9)  9 + sqrt(9) 235 = (((sqrt(9)!)!  9  sqrt(9)!) / sqrt(9) 236 = (((sqrt(9)!)!  9  sqrt(9)) / sqrt(9) 237 = ((sqrt(9)!)!/sqrt(9)  9 / sqrt(9) 238 = (((sqrt(9)!)!  9 + sqrt(9)) / sqrt(9) 239 = ((sqrt(9)!)!/sqrt(9)  9 / 9 240 = ((sqrt(9)!)!/sqrt(9)  9 + 9 etc. I also prefer: 198 = 99 + 99 Last fiddled with by alpertron on 20070203 at 19:03 
20070204, 13:04  #27 
Account Deleted
"Tim Sorbera"
Aug 2006
San Antonio, TX USA
1000010101011_{2} Posts 
You're going to wear out your 9 keys.

20070204, 13:50  #28 
Jun 2003
The Texas Hill Country
10001000001_{2} Posts 

20070204, 15:25  #29 
Oct 2004
Austria
100110110010_{2} Posts 
It's a pity that .9~ = 9/9 is not allowed, otherwise we could do this:
94=99(√9)!+.9~ a 94 without using .9~ anyone? 
20070205, 05:13  #30 
1976 Toyota Corona years forever!
"Wayne"
Nov 2006
Saskatchewan, Canada
2×3×773 Posts 
Give up?? on 94 that is?? should I give the answer or do you want to try a little longer first?? I will confess I could not get it myself...my son had to find it via a computer progran...

20070205, 12:22  #31  
Aug 2002
Buenos Aires, Argentina
2^{2}×3×113 Posts 
226 = (sqrt(9)!)^sqrt(9) + 9/.9
230 = ((sqrt(9)!)!/sqrt(9)  9/.9 Quote:
103 = 9/9% + 9/sqrt(9) 106 = 9/9% + sqrt(9) + sqrt(9) 150 = ((9*9)/9%)/sqrt(9)! 181 = 9*9 + 9/9% 191 = (9+9)/9%9 194 = (9+9)/9%sqrt(9)! 197 = (9+9)/9%sqrt(9) 199 = 99 + 9/9% 203 = (9+9)/9%+sqrt(9) 206 = (9+9)/9%+sqrt(9)! 209 = (9+9)/9%+9 220 = ((sqrt(9)!)!/sqrt(9)! + 9/9% Last fiddled with by alpertron on 20070205 at 13:12 

20070205, 13:34  #32 
Aug 2002
Buenos Aires, Argentina
2^{2}×3×113 Posts 
140 = 9/((sqrt(9)!)%)  9/.9
141 = 9/((sqrt(9)!)%)  sqrt(9)!  sqrt(9) 146 = (sqrt(9)!)/((sqrt(9))%)  9 * sqrt(9)! 148 = 9/((sqrt(9)!)%)  sqrt(9)!/sqrt(9) 149 = 9/((sqrt(9)!)%)  9/9 152 = 9/((sqrt(9)!)%) + sqrt(9)!/sqrt(9) 170 = (sqrt(9)!)/((sqrt(9))%)  9/(sqrt(9%)) 173 = (sqrt(9)!)/((sqrt(9))%)  sqrt(9)^sqrt(9) 177 = 9/((sqrt(9)!)%) + sqrt(9)^sqrt(9) 188 = (sqrt(9)!)/((sqrt(9))%)  9  sqrt(9) 190 = (sqrt(9)!)/((sqrt(9))%)  9/.9 212 = (sqrt(9)!)/((sqrt(9))%) + 9 + sqrt(9) 227 = (sqrt(9)!)/((sqrt(9))%) + sqrt(9)^sqrt(9) Last fiddled with by alpertron on 20070205 at 14:05 
20070205, 14:58  #33 
Aug 2002
Buenos Aires, Argentina
54C_{16} Posts 
182 = (sqrt(9)!)/((sqrt(9))%)  9  9
185 = (sqrt(9)!)/((sqrt(9))%)  9  sqrt(9)! 