Yikes, I didn't get very many, but:
0 = D. C. at which W. F. - Degrees Centigrade at which Water Freezes
1 = if by L. - if by Land
2 = if by S. - if by Sea
2 = P. in a P. Peas in a Pod?
2 = Q. in a H.-D. - Quarters in a Half Dollar
2 = W. that D.'t M. a R. - Wrongs that Don't Make a Right
3 = B M (S H T R) - Blind Mice (See How They Run)
3 = B. of the U. S. G. - Branches of the United States Government
3 = F. in a Y. - Feet in a Yard
3 = L. on a T. - Legs on a Tripod?
3 = L.P. - Little Pigs
3 = M. and a B. - Men and a Baby
3 = S. and Y.'re O. - Strikes and You're Out
3 = S. to the W. - Sheets to the Wind
5 = F. on a H. - Fingers on a Hand
5 = T. on a F. - Toes on a Foot
6 = of O. and a H. D. of the O. of One and a Half Dozen of the Other?
7 = D of the W - Days of the Week
8 = L. on a S. - Legs on a Spider
8 = L. on an O. - Legs on an Octopus
9 = J. on the U. S. S. C. - Justices on the United States Supreme Court
10 = D. in a T. N. with the A. C.
10 = Y. in a D. - Years in a Decade
12 = E. in a D. - Eggs in a Dozen
12 = K. of the R. T. - Knights of the Round Table
12 = M. in a Y. - Months in a Year
12 = S of the Z - Signs of the Zodiac
22 = C-22 - Catch-22
24 = H in a D - Hours in a Day
25 = C. in a Q. - Cents in a Quarter
25 = P. in a Q. - Pennies in a Quarter
26 = L of the A - Letters of the Alphabet
28 = D in F - Days in February
29 = D in F in a L Y - Days in February in a Leap Year
32 = D F at which W F - Degrees Farenheit at which Water Freezes
40 = D and N of the G F - Days and Nights of the Great Fast?
50 = W. to L.Y.L. - Ways to Leave Your Lover
52 = W. in a Y. - Weeks in a Year
54 = C. in a D. (with the J.) - Cards in a Deck (with the Jokers)
57 = H V - Heinz Varieties?
60 = M. in a H. - Minutes in a Hour
60 = S in a M - Seconds in a Minute
80 = D. to G. A. the W. - Days to Get Around the World
88 = P K - Piano Keys
99 = B. of B. on the W. - Bottles of Beer on the Wall
100 = D. C. at which W. B. - Degrees Centigrade at which Water Boils
100 = Y. in a C. - Years in a Century
100 = Y. in a F. F. - Yards in a Football Field?
180 = D. in a T. - Degrees in a Triangle
360 = D. in a C. - Degrees in a Circle
365 = D in a Y - Days in a Year
366 = D. in a L. Y. - Days in a Leap Year
2001 = a S. O. - A Space Odessy (that's not spelled right, is it?)
5280 = F. in a M. - Feet in a Mile
20000 = L. U. the S. - Leagues Under the Sea
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“It has always been the prerogative of children and half-wits to point out that the emperor has no clothes. But a half-wit remains a half-wit, and the emperor remains an emperor.â€
― Neil Gaiman, The Sandman, Vol. 9: The Kindly Ones