From 1938 to 2003 and 2006 to the present, it is Thomas Jefferson's home, Monticello.
The two reverses of 2004 honoring the Lewis and Clark Expedition depict the Indian Peace Medal which they presented to Native American leaders they dealt with on the trip and the keelboat they used to travel up the Missouri River. The series continued in 2005 with a bison (American buffalo) and a scene depicting their first view of the Pacific Ocean.
Before that:
> Shield nickels (1866-1883) - the number 5
> Liberty nickels (1883-1912) - the Roman numeral V, for 5.
> Buffalo nickels (1913-1938) - guess what, a buffalo!
monticello
The building on the reverse [tails] side of the Jefferson nickel is the home of Thomas Jefferson, Monticello, located in Charlottesville, Virginia. There is a caption right under the building that identifies it.
Not who, but what. Please see the Related Question.
There is no person on the reverse side of a US dime, it is a torch along with oak and olive branches. On the obverse (heads) side of the current US dimes, Franklin D. Roosevelt is displayed.
The mint mark on a 1939 Jefferson Nickel is located on the obverse (tails) side of the coin, just to the right of Monticello (the building) between the rim and the building. If there is no mark there then the coin was produced at the U.S. Mint facility in Philadelphia, Pennsylvania.
There are eight possible results when flipping three coins (eliminating the highly unlikely scenario of one or more coins landing on their edge): Dime - Heads / Nickel - Heads / Penny - Heads Dime - Heads / Nickel - Heads / Penny - Tails Dime - Heads / Nickel - Tails / Penny - Heads Dime - Heads / Nickel - Tails / Penny - Tails Dime - Tails / Nickel - Heads / Penny - Heads Dime - Tails / Nickel - Heads / Penny - Tails Dime - Tails / Nickel - Tails / Penny - Heads Dime - Tails / Nickel - Tails / Penny - Tails
On the obverse (heads) side is an image of President Thomas Jefferson, and the reverse (tails) shows his home Monticello.
monticello
The building on the reverse [tails] side of the Jefferson nickel is the home of Thomas Jefferson, Monticello, located in Charlottesville, Virginia. There is a caption right under the building that identifies it.
The Liberty Nickel is a USA 5 cent coin which was minted from 1883 to 1912, bearing the image of Lady Liberty on the obverse [heads] side of the coin and a large letter "V" on the reverse [tails] side of he coin.
Not who, but what. Please see the Related Question.
Side-facing bust of Abraham Lincoln on the "heads" side, and Lincoln Memorial on the "tails" side.
The tails side is the side without the head on it.
The presence of the word Monticello under the building indicates it's an image of Thomas Jefferson's home on the other side of a nickel.
The standard nickel has the Jefferson Memorial on the back of it. There have been a number of new nickels issued with other pictures.
5 cents
In US currency, a 5¢ coin is the "nickel" (made of copper and nickel). On the heads (obverse) side, there is a picture of Thomas Jefferson, and the words "IN GOD WE TRUST", as well as "Liberty", and the date, and possibly a mint mark. On the tails (reverse) side, the words "E PLURIBUS UNUM", " UNITED STATES OF AMERICA", and, on the coins where the building is shown, it has the word "Monticello" underneath a picture of Jefferson's home, Monticello.