Can anyone figure out these play on words and numbers?

Question

Here is an example: 26 = L of the A, 26 Letters of the Alphabet

So here are the ones I need help with.

3 = B M (SHTR)

5 = D in a Z C

1,000 = W that a P is W

64 = S on a C

Thanks for the help

Answer 1

3 = B M (SHTR) is 3 Blind Mice (See How They Run?)

5 = D in a Z C is 5 Digits in a Zip Code

1,000 = W that a P is W  is 1000 Words that a Picture is Worth

64 = S on a C is 64 Squares on a Chessboard

Answer 2

5= digits in a zip code is the only one I got