Update duckdb index files

Gxg--Math23K/train/index.duckdb

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:90cb4178eba7a09d58c533cb85f5a0a0b800aea251766af6494d2a8f2b5e161e
-size 11546624
+oid sha256:1a8115a2f3be8b0b9f5718a3f6e48ca55c1101ac7149e147dec9a5e6fe364c1e
+size 15478784