Last 7 Days

If one side of the bottom layer of a triangular pyramid of bowling balls has 12 balls, how many are there in the whole pyramid?

At evening by my whole you'll think of days gone by, and never reckon that of my second, my first is made, and by my first my second.

What is the difference between a professor and a mosquito?

What word is that which by having a single letter transposed becomes its own opposite?

A word of one syllable, easy and short, read backward and forward the same, expresses the sentiments warm from the heart, and to beauty lays principal claim.

Why is life the greatest of all conundrums?

What city was made by time and labor?

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