| 20 | 18th LS(200308) 도형의 닮음 C단계 문제(P134 #735) | Jp Park  | 2020-03-08 | 0 |
| 19 | 17th LS(200307) 도형의 닮음 C단계 문제(P124 #669) | Jp Park | 2020-03-07 | 0 |
| 18 | 16th LS(200304) 도형의 닮음 C단계 문제(P120 #646) | Jp Park | 2020-03-04 | 0 |
| 17 | 15th LS(200303) 삼각형의 내각의 이등부선과 넓이(P114 #607) | Jp Park | 2020-03-03 | 0 |
| 16 | 14th LS(200302) 도형의 닮음 연습문제+평행선사이의 길이의 비(P106) | Jp Park | 2020-03-02 | 0 |
| 14 | 12th LS(200226) 도형의 닮음(P91) | Jp Park | 2020-02-26 | 0 |
| 9 | 7th LS(200218) 삼각형의 내심, 외심 C단계+평행사변형(P46) | Jp Park | 2020-02-18 | 0 |
| 3 | 1st LS(200206) C단계 만점 도전하기 (P197) | Jp Park | 2020-02-06 | 0 |
| 258 | 256th LS(211105) Capacity(PDF 152) | Jp Park | 2021-11-06 | 1 |
| 252 | 250th LS(211010) Sequence Medium | Jp Park | 2021-10-10 | 1 |
| 247 | 245th LS(210924) Arithmetic Progression (PDF 118) | Jp Park | 2021-09-25 | 1 |
| 242 | 240th LS(210905) Ch2 Set and Venn Diagram (PDF 46) | Jp Park | 2021-09-05 | 1 |
| 239 | 237th LS(210826) Ch3 Review Set (PDF 95) | Jp Park | 2021-08-26 | 1 |
| 237 | 235th LS(210821) Ch28. Standard Normal Distribution Exercise.. | Jp Park | 2021-08-21 | 1 |
| 233 | 231th LS(210815) Ch26. Correlation (PDF 720) | Jp Park | 2021-08-15 | 1 |
| 224 | 222th LS(210730) Ch18 Properties of Curve (PDF 489) | Jp Park | 2021-07-31 | 1 |
| 219 | 217th LS(210722) Ch14 Eulers form (PDF 389) | Jp Park | 2021-07-22 | 1 |
| 217 | 215th LS(210718) Ch13 Vector Applications (PDF 344) | Jp Park | 2021-07-19 | 1 |
| 211 | 209th LS(210710) Ch9.E Proof by exhaustion (PDF 224) | Jp Park | 2021-07-11 | 1 |
| 206 | 204th LS(210703) Ch5 Real Polynomials (PDF 131) | Jp Park | 2021-07-04 | 1 |
