Update duckdb index files

Gxg--Math23K/train/index.duckdb

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:917a67aad7efc9661ae164d174395b307ea4ff97f1544f03ed8d02b61dd92530
-size 12333056
+oid sha256:90cb4178eba7a09d58c533cb85f5a0a0b800aea251766af6494d2a8f2b5e161e
+size 11546624