What has one letter and starts with an E?

I have nine bottles of wine and one of the nine bottles is poisoned.
I need to find the poisoned bottle with two facts
(1) Poison is deadly, only a sip will cost death
(2) I have two mice to do so.

How should I do it?

Which five letter word can be added at the end of below word to form a
valid word?

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Next Number in the Series,

5, 16, 49, 104, ?

John can fit six large chocolate boxes or nine small chocolate boxes into a carton. How many cartons will he require to put sixty-six chocolate boxes into?

How many letters are in the alphabet?

Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?

Count the number of lines in the image below ?

A sundial has the fewest moving parts of any timepiece. Which has the most?

Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.