Tish'a Ve'esrim - mi yodeya? ויאמרו לו אמר-נא שבלת ויאמר סבלת how do we read Judges 12:6, was there ever supposed to be a different pronunciation between samech and sin?
Shemona Ve'esrim - mi yodeya? Kicking myself for not thinking of the ply-threads; that one's in Rashi on Chumash. Alex, are you using Bar-Ilan for these? That's how I'd do it if I took this more seriously ...