More letter equations - some easy-peasy, some a bit trickier. As ever, no valiant tries are turned away, even if they don't match my answer

-A. 1 = H. O. S.
-B. 3 = L. P.
-C. 4 = S. in a Y.
-D. 7 = Y. B. L. for B. a M.
-E. 10 = A. to the C. in the B. of R.
-F. 16 = P. in a C. S.
-G. 21 = S. in a G.
-H. 22 = L. in the H. A.
-I. 235 = I. of U. in the A. B..
-J. 500 = I.
-K. 714 = B. N. of S. J. F.
-L. 1000000 = H. E. D. P. U. a T. of B. and S. "B. M. H." Think 1960s adverts

K. 714 = badge number of Sergeant Joe Friday

H. 22 Letters in the Hebrew Alphabet

E. 10 Amendments to the Constitution in the Bill of Rights

All great solves!

D. 7 years bad luck for breaking a mirror

Hi Rog.

Hi Remi - you got it!

F. 16 Pawns in a Chess Set

c: 4 = seasons in a year

I. 235 = Isotope of Uranium in the Atomic Bomb

F. 16 pieces in a Chess set

Three out of four, ladies and gentlemen - manxman gets the cigar shaped like a chess-piece

A. 1 Horse Open Sleigh

B. 3 Little Pigs

Ladies - I salute you!

G. Shillings in a Guinea.

Nice solve, Remi!

J. 500 = Indianapolis or Indy?

Yes, Cheryl!

...apologies for #10 - I think it's UK only

10 must be something to do with "beans means Heinz" but I still cannot figure it out...

... actually, yes I can with help from Mrs Lex: a million housewives every day pick up a tin of beans and say "beans means Heinz!"

Once burned into your memory, never forgotten!

I rest my case

Mrs Lex