One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

Who is that with a neck and no head, two arms and no hands? What is it?

John is 45 years older than his son Jacob. If you find similarities between their ages, both of their ages contain prime numbers as the digits. Also, John's age is the reverse of Jacob's age.

Can you find their ages?

A woman is sitting in her hotel room and hears a knock at the door. She opens the door to see a man whom she’s never met before. He says, “I’m sorry, I have made a mistake, I thought this was my room.” He then goes down the corridor and into the elevator. The woman goes back into her room and calls security. What made the woman so suspicious of the man?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

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

There once were seven dwarfs who were all brothers. They were all born two years apart. The youngest dwarf is seven years old. How old is his oldest brother?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

What goes through cities and fields, but never moves?

Can you replace the X (both small and big x) with the numbers between 1 to 19 such that all the rows of 3 numbers between X (big x) sum to 23?