なぞなぞでわありませんでした
謎々ではありませんでした
nazonazodewārimasendeshita

Noun
Desu Copula

The polite, past negative form of なぞなぞ

1. Was not a riddle.; Was not puzzling.

Past/Perfective
Negative
Polite
Formal Register
Usually Written in Kana