What three numbers, none of which is zero, give the same result whether they’re added or multiplied?

By what process could you make a 'Tea-Table' into food?

Can you make the number 24 by utilizing the numbers 1, 3, 4 and 6? You must use one number only one time and you can use mathematical operation symbols anytime anywhere.

Find three whole, positive numbers that have the same answer when multiplied together as when added together.

Two in a corner, one in a room, zero in a house, but one in a shelter. What am I?

A professor thinks of two consecutive numbers between 1 and 10.
'A' knows the 1st number and 'B' knows the second number

A: I do not know your number.
B: Nor do I know your number.
A: Now I know.

What are the four solutions for this?

John is the son of Jacob.
So,
Jacob is the_____of John's father?

You have two strings whose only known property is that when you light one end of either string it takes exactly one hour to burn. The rate at which the strings will burn is completely random and each string is different. How do you measure 45 minutes?

A man is shown a portrait painting. He looks closely, then tells, “Brothers and sisters have I none, but that man’s father is my father’s son!” Who is the man in the portrait?

What occurs twice in a week, once in a year but never in a day?