Saturday, 11 January 2014

riddle - The thought of my prefix brings many a smile; My infix is, mathematically


Here's my first attempt at a Riley! Good luck!




The thought of my prefix brings many a smile;


Sit down, relax, or sleep for a while.


My infix is, mathematically;


One point six times five point eight, then less three.


My suffix is a speech, mad and long;


Which definitely is not a song.




Answer





Restaurant



Prefix



Rest is a synonym for relax, etc. and people look forward to it wistfully, with smiles on their faces.



Infix



Tau (twice pi) is approximately $6.28$, which is $1.6 * 5.8 - 3$. Clued in by @Omega Krypton.




Suffix



Rant, which is an unhappy speech



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