3) English. English used to be the second-most common language, but Spanish-speakers have increased much more rapidly over the past 15 years. Still, scholars have named English the worldâs âmost influential language,â due to the number of speakers (360 million) and the number of countries in which it is spoken.
1964 was the date on the last 90% silver coins. Silver coins were  actually made up through the early part of 1966 but the 1964 date  was used on all of those. 1965 was usedâ¦ on the clad coins that were  made in that year. So any dime, half dollar or quarter with a date  of 1964 is 90% silver.
The first US dimes and quarters were minted in 1796. They continued  to be struck from silver until 1964 when the rise in silver prices  forced the Mint to change to the curâ¦rent copper-nickel clad  composition.    Silver half-dollars and dollars were first minted in 1794.