Coin Roll Hunting Trivia Game.

I think he wants the answers with the questions...

1.40 face of 90% and 3.50 face of 40% is the closest amount to a troy ounce.

Be careful in the "What was the last year half dollars contained silver?" question.

90% silver proofs are still made each year.

The 1970-D (Mint set issue only) and 1970-S (proof set issue only) were the last 40% year. Like the present day 90% silver proofs, they were only available in special sets.

More half questions:
1. What three years were JFKs made without mint marks?
Answer: 65, 66, 67
2. What is the only year you might encounter the mint mark on the REV side of a JFK half?
Answer: 1964
4. What are the two most commonly known JFKs with a "No FG" error (missing the designer initials on the REV)?
Answer: 1982-P and 1972-D
5. What are the most commonly known years JFK halves had RPMs?
Answer: 1964-D, 1971-D, 1973-D, 1984-D, 1989-D
6. What are the four most commonly known years for JFK DDO halves?
Answer: 1971-D, 1972-P, 1973-D, 1974-D, 1977-D
7. Which two JFK half dates are most commonly known to have major rotated die examples?
Answer: 1971-D, and 1988-p

Guys
Is this correct?

What was the last year half dollars contained silver? (1970)

The 1970's were in mint sets only, but what about 1976 sets that were made with 40%ers?

I think the questions should be?
What year was the last year the US made half dollars containing 90% silver for circulation? (1964)

What are the years the US made half dollars that contained 40% silver for circulation? (1965,1966,1967,1968,1969)

Then you could ask questions about the proof sets.

To everybody who said something about the Last year of Silver Half Dollars, I made a mistake. the only questions I have related to Halfs are,

What percentage of Silver does Half Dollars dated from 1965 to 1970 have?

What percentage of Silver does 1964 Kennedy half dollars have?

When were the 40% Silver Half Dollars Minted?

I am sorry for the coinfusion, but I will try my best to get everything that everybody has ask. Thank you!

What years did the U.S. have a silver nickel?

42, 43, 44,45 There are 11 coins all together, the 42d wasn't silver.

Careful here. You could argue that other P coins were made without mintmarks. How about "What three years were JFKs made without mint marks regardless of the mint of origin?"

1. What is the oldest half dollar date that could fit in a roll?
A. 1836.
2. If a dateless Indian Head five cent piece (nickel) has a raised exergue on the reverse, what year is it from?
A. 1913.
3. In what year did the San Francisco mint begin minting silver proofs?
A. 1992.
4. What percentage is a modern five cent piece (nickel) is actually nickel?
A. 25%.
5. What is the only half dollar date with a mintage over 300 million?
A. 1971-D.
6. Why are half dollars dated 2002-present difficult to find in rolls?
A. They are not released into circulation.
7. What Kennedy half dollar dates (regardless of mintmark) were not released into circulation?
A. 1970, 1987, 2002-present.
8. What was the first year that cents of the current diameter were struck for circulation?
A. 1857.
9. The Roosevelt dime has been issued since what year?
A. 1946.
10. What is the oldest current coin design?
A. The obverse of the Lincoln Cent, from 1909.
11. Small-size dollars have been issued since what year?
A. 1979.
12. What is the composition of a five cent piece (nickel) issued in 1943?
A. 0.56 Cu, 0.35 Ag, 0.09 Mn.
13. Since 1836, in what years have the weight of the circulating half dollar changed?
A. 1853, 1873, 1965, 1971.
14. How many grams does an 1873-1964 dime weigh?
A. 2.5.
15. What is the oldest five cent piece (nickel) date that could be found in a roll?
A. 1866.

These are the first ones that came to mind, but I can provide lots more if you like.
This sounds like an interesting project. Good luck!