In the additions below, all digits have been replaced by letters. Equal letters represent equal digits and different letters represent different digits.

RE + MI = FA
DO + SI = MI
LA + SI = SOL

The question: What do the complete additions look like in digits?

The solution: Click here!

Another question: What about this one?

TWENTY
TWENTY
TWENTY
   TEN
   TEN
------ +
EIGHTY

Another solution: Click here!

Yet another question: Thanks to Mike and Ruth VanderMeer from Canada, we can present you the following puzzle:

Four words add up to a fifth word numerically:

   mars
  venus
 uranus
 saturn
-------- +
neptune

Each of the ten letters (m, a, r, s, v, e, n, u, t, and p) represents a digit in the range 0 up to 9 (equal letters represent equal digits and different letters represent different digits). Furthermore, the digits 1 and 6 are being used most frequently.

What number does neptune represent?

Yet another solution: Click here!

The fourth question: What about this one?

 SEND
 MORE
----- +
MONEY

The fourth solution: Click here!

The fifth question: In the addition below, all digits have been replaced by letters. Equal letters represent equal digits and different letters represent different digits.

 ONE
DEUX
---- +
DREI

The digit 0 does not occur. What is the highest possible value for DREI?

The fifth solution: Click here!