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

Living above a star, I do not burn
Eleven friends and they do not turn
I can just be visited in a sequence, not once or repeatedly
PQRS are my initials
Can you tell my name accurately?

Why are televisions attracted to people?

In front of you, there are 9 coins. They all look absolutely identical, but one of the coins is fake. However, you know that the fake coin is lighter than the rest, and in front of you is a balance scale. What is the least number of weightings you can use to find the counterfeit coin?

What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?

When can we add 2 to 11 and get 1 as the correct answer?

One day, John and his friends were playing around. Jacob hit something with a Pin and it popped. John's dad came into the room that very moment, but he wasn't mad. In fact, he was smiling. What did Jacob hit?

When is the top of a mountain similar to a savings account?

You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?

A 3 digit number is such that it's unit digit is equal to the product of the other two digits which are prime. Also, the difference between it's reverse and itself is 396.

What is the sum of the three digits?