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

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

There is a straight highway. Four different villages lie on that highway. The distance between them is different. The third village is 60km away from the first village; the fourth is 40 km away from the second; the third is 10 km near to the fourth that it is to the second.

Can you calculate the distance between the fourth and the first village ?

What does below pictogram mean?

I am a type of room you cannot enter or leave. Raised from the ground below, I could be poisonous or a delicious treat. What am I?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

Using eight eights and addition only, can you make 1000?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

1 dollar = 100 cent
= 10 cent x 10 cent
= 1/10 dollar x 1/10 dollar
= 1/100 dollar
= 1 cent

=> 1 dollar = 1 cent

solve this tricky problem?