Got a few more...
e. 54 = C. in a D. (with the J.)
54 Cards in a Deck with the Jokers
h. 13 = S. on the A.F.
13 Stripes on the American Flag
J. 18 = H. on a G.C.
18 Holes on a Golf Course
k. 90 = D. in a R.A.
90 Degrees in a Right Angle
l. 200 = D. for P.G. in M.
200 Dollars for Passing Go in Monopoly
u. 1,000 = W. that a P. is W.
1000 Words that a Picture is Worth
w. 64 = S. in a C.
64 Squares in a Chessboard
x. 40 = D. and N. of the G.F.
40 Days and Nights of the Great Flood

Still struggling with:
c. 1,001 = A.N.
g. 88 = P. K.
m. 8 = S. on a S.S.
o. 4 = Q. in a G.
q. 1 = W. on a U.
r. 5 = D. in a Z.C.
s. 57 = H.V.
t. 11 = P. on a F.T.