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

In a town, there are four houses located at different distances from each other. Following are the distances:

The third house is 60 meters apart from the first house.
The fourth house is 40 meters apart from the second house.
The third house is 10 meters nearer to the fourth house than it is to the second house.

Can you find out the distance between the fourth and the first house?

John can place six large boxes or nine small boxes into a carton.

Can you find out in how many cartons can he place sixty-six boxes in total?

What animal walks on four legs in the morning, two legs during the day, and three legs in the evening?

Oedipus, the king of Thebes, figured out the answer to the riddle:

Which is Odd One Out and why?

4377

3954

9862

8454

9831

What number when divided in half becomes zero?

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

f you were running a race, and you passed the person in 2nd place, what place would you be in now?

John is looking at Jenifer, but Jenifer is looking at Jacob. John is married, but Jacob is not.

Is a married person looking at an unmarried person ?