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

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

What has hands, but can’t clap?

What's the best place to go shopping in the ocean?

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

In a competitive exam, each correct answer could win you 10 points and each wrong answer could lose you 5 points. You sat in the exam and answered all the 20 questions, which were given in the exam.
When you checked the result, you scored 125 marks on the test.

Can you calculate how many answers given by you were wrong?

I have 50 feet long of cloth, I need to create 50 handkerchiefs each size of 1 foot. I take one minute to cut a 1-foot handkerchief. So how long will it take to cut 50 handkerchiefs?

Solve below rebus puzzle?

What is the longest word in the dictionary?