Three elderly gentlemen went to the doctor for their regular check-up.

After examining them, the doctor decided to give them a simple memory test.

He turned to the first man and asked, “Tell me, what is three times three?”

The first man stared at the ceiling, scratched his head, and said confidently, “274.”

The doctor blinked.

“Right… thank you.”

Then he turned to the second man.

“And you, sir. What is three times three?”

The second man smiled proudly and answered, “Tuesday.”

The doctor sighed and made a note on his clipboard.

Finally, he turned to the third man.

The third man was sitting up straight, looking calm and confident.

“Now, what is three times three?” the doctor asked.

Without hesitation, the third man replied, “Nine.”

The doctor’s face lit up.

“Excellent!” he said. “That’s absolutely correct.”

The first two men looked impressed. The doctor smiled, feeling relieved that at least one of them still had a sharp mind.

He leaned closer and asked, “Tell me, how did you figure that out?”

The third man crossed his arms proudly and said:

“Easy. I just subtracted Tuesday from 274.”