Another mind game

Yes, the answer to Einstein's Riddle was the German.

Here's another puzzle that won't kill as much time...

1: An Exam to your WITS This test does not measure your intelligence, your fluency with words and certainly not your mathematical ability. It will, however, give you some gauge of your mental flexibility and creativity. In the three years since the test was developed, few people could solve more than half the 23 questions on the first try. Many, however, reported getting answers long after the test had been set aside, particularly at unexpected moments when their minds were relaxed; and some reported solving all the questions over a period of several days. INSTRUCTIONS: Each question below contains the initial of words that will make it correct. Find the missing words.
Example: 16 = O in a P. Ounces in a Pound

1. 26 = L of the A
2. 1001 = A N
3. 7 = W of the W
4. 12 = S of the Z
5. 54 = C in a D (with the J)
6. 9 = P in the S S
7. 88 = P K
8. 13 = S on the A F
9. 32 = D F at which W F
10. 18 = H on a G C
11. 90 = D in a R A
12. 200 = D for P G in M
13. 8 = S on a S S
14. 3 = B M ( S H T R )
15. 4 = Q in a G
16. 24 = H in a D
17. 1 = W on a U
18. 5 = D in a Z C
19. 57 = H V
20. 11 = P on a F T
21. 1000 = W that a P is W
22. 29 = D in F in a L Y
23. 64 = S on a C