This happened sometime ago, definitely not this year ...
Najib asked LKY, "Mr Lee, how do you run such an efficient government? Are there any tips you can give to me?"
"Well," said LKY, "the most important thing is to surround yourself with intelligent people."
Najib frowned, and then asked, " But how do I know the people around me are really intelligent?"
LKY took a sip of tea. "Oh, that's easy; you just ask them to answer an intelligent riddle."
LKY pushed a button on his intercom.
"Please send Tony Tan in here, would you?"
Tony Tan walked into the room and said, "Yes, Mr Lee?"
LKY smiled and said, "Answer me this please, Tony, your mother and father have a child.
It is not your brother and it is not your sister. Who is it?"
Without pausing for a moment, Tony Tan answered, "That would be me."
"Yes! Very good," said LKY.
Najib went back home to ask Muhyiddin the same question. "answer this for me. Your mother and your father have a child.
It's not your brother and it's not your sister. Who is it?"
"I'm not sure," said Muhyiddin. "Let me get back to you on that one..."
He went to his advisors and asked every one, but none could give him an answer.
Finally, he ended up in the men's room and recognized Anwar Ibrahim's shoes in the next stall.
Muhyiddin didn't want but asked anyway, "Anwar, can you answer this for me?
Your mother and father have a child and it's not your brother or your sister. Who is it?
Anwar yelled back, "That's easy, it's me!"
Mahyudin smiled, and said, "Thanks!"
Then, he went back to speak with Najib."Sir, I did some research and I have the answer to that riddle.
It's Anwar Ibrahim!"
Najib got up, stomped over to Muhyiddin, and angrily yelled into his face.
"No! You idiot! It's Tony Tan!"