1999

No.141 (1/4) Problems & Answers	No.142 (1/11) Problems & Answers	No.143 (1/18) Problems & Answers	No.144 (1/25) Problems & Answers
No.145 (2/1) Problems & Answers	No.146 (2/8) Problems & Answers	No.147 (2/15) Problems & Answers	No.148 (2/22) Problems & Answers
No.149 (3/1) Problems & Answers	No.150 (3/8) Problems & Answers	No.151 (3/15) Problems & Answers	No.152 (3/22) Problems & Answers
No.153 (3/29) Problems & Answers	No.154 (4/5) Problems & Answers	No.155 (4/12) Problems & Answers	No.156 (4/19) Problems & Answers
No.157 (4/26) Problems & Answers	No.158 (5/3) Problems & Answers	No.159 (5/10) Problems & Answers	No.160 (5/17) Problems & Answers
No.161 (5/24) Problems & Answers	No.162 (5/31) Problems & Answers	No.163 (6/7) Problems & Answers	No.164 (6/14) Problems & Answers
No.165 (6/21) Problems & Answers	No.166 (6/28) Problems & Answers	No.167 (7/5) Problems & Answers	No.168 (7/12) Problems & Answers
No.169 (7/19) Problems & Answers	No.170 (7/26) Problems & Answers	No.171 (8/2) Problems & Answers	No.172 (8/9) Problems & Answers
No.173 (8/16) Problems & Answers	No.174 (8/23) Problems & Answers	No.175 (8/30) Problems & Answers	No.176 (9/6) Problems & Answers
No.177 (9/13) Problems & Answers	No.178 (9/20) Problems & Answers	No.179 (9/27) Problems & Answers	No.180 (10/4) Problems & Answers
No.181 (10/11) Problems & Answers	No.182 (10/18) Problems & Answers	No.183 (10/25) Problems & Answers	No.184 (11/1) Problems & Answers
No.185 (11/8) Problems & Answers	No.186 (11/15) Problems & Answers	No.187 (11/22) Problems & Answers	No.188 (11/29) Problems & Answers
No.189 (12/6) Problems & Answers	No.190 (12/13) Problems & Answers	No.191 (12/20) Problems & Answers	No.192 (12/27) Problems & Answers