In a contest, four fruits (an apple, a banana, an orange, and a pear) have been placed in four closed boxes (one fruit per box). People may guess which fruit is in which box. 123 people participate in the contest. When the boxes are opened, it turns out that 43 people have guessed none of the fruits correctly, 39 people have guessed one fruit correctly, and 31 people have guessed two fruits correctly.
How many people have guessed three fruits correctly, and how many people have guessed four fruits correctly

What goes through cities and fields, but never moves?

I am a three digit number.
My tens digit is five more than my ones digit.
My hundreds digit is eight less than my tens digit.
What number am I?

What's a single-digit number with no value?

I am sure no one can have two things for dinner. what are they?

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

In the picture given below, can you find out which digit will take place of the question mark?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

I can turn polar bears white.
I can make anyone dance.
I can make everyone cry
I can make your hands clap
I can make you thin.
I can make you smile.
I can make you smile

Can you guess the riddle?

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?