The centre of the third figure is empty. What digit should fit inside?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

What is the below Rebus indicate?

What is the largest number you can write with just 3 digits?

It belongs to you, but other people use it more than you do. What is it?

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

How much will a 38° angle measure when looked at under a microscope that magnifies ten times?

A man is sitting in a bar when a rich man sits next to him. He turns to the rich man and says, “Did you know I know almost every song that has ever existed?”

The rich man laughs. The man then says, “I bet you all the money you have in your wallet that I can sing a genuine song with a lady’s name of your choice in it. The rich man laughs again and says, “OK, how about my daughter’s name, Jamie Armstrong-Miller?” Minutes later, the man collects his cash and the rich man goes home cashless. What song did the man sing?

Twenty frogs are sitting on a log floating on the surface of a river. Two of them decide to jump off into the water.

How many frogs are there on the log at this moment?

You and your two friends are working in a multinational company. How can you three find out the average salary of you all without disclosing your own salary to the other two?