Cryptarithms.com

Cryptarithms
A cryptarithm is a type of mathematical puzzle in which the digits are replaced by symbols (typically letters of the alphabet). For example:

9567 + 1085 = 10652

can be represented thus:

abcd + efgb = efcbh

 

Alphametics
The term alphametic is used when the letters form words and phrases. Here's a famous one:

S E N D + M O R E M O N E Y

Solve

9 5 6 7 + 1 0 8 5 1 0 6 5 2

There is also a subset of alphametics called 'doubly-true' where the words are spelt out numbers which also form a valid sum:

F O R T Y T E N + T E N S I X T Y

Solve

2 9 7 8 6 8 5 0 + 8 5 0 3 1 4 8 6

Try these other examples.

 

Cryptarithm Rules

• Numbers must not start with a zero.
• Each letter represents a unique digit.
• The solution is unique (unless otherwise stated).

 

Links to other cryptarithm sites

• Jorge Soares's Cryptarithms.
• The Contest Center.
• Alphametic Puzzle Generator.
• Alphametic Puzzle Solver.

 

Other sites
If you like number puzzles, try Combination Lock.