Question 1
Alex has five chests labeled with letter codes, as shown.
He has five numbered keys for these chests. Equal digits correspond to equal letters, and different digits to different letters. Unfortunately, one key has lost its number. The four remaining numbers are shown below.
Which number is missing?
He has five numbered keys for these chests. Equal digits correspond to equal letters, and different digits to different letters. Unfortunately, one key has lost its number. The four remaining numbers are shown below.
Which number is missing?