Monthly Archives: April 2015


Header image problem

“How many plant species are there?” It was of course my old friend professor Brainstrain who asked this. His nephew looked bewildered.
“10? No, more”, he thought. Then he asked: “over a hundred, maybe?”
“Many more,” the professor asked with a smile.
He went on:
“In the following addition, every digit had been replaced with a letter. Find the original sum.
Alphametic puzzle plants

You can check your solutions here