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

There were three women in all the swimming costumes!
One was happy and the other two were sad!
The happy one was crying and the sad ones were smiling.
Why was this?

What has a bottom at the top?

During an interview, the interviewer ordered hot coffee for the candidate to relieve the stress. The coffee was kept before him. After a minute, the interviewer asked him, 'What is before you?' He replied 'Tea'.

The candidate was selected immediately. Why?

Where do you go to learn how to make ice cream?

If in a code language, DISTANCE is written as IDTUBECN and DOCUMENT is written as ODDVNTNE, the how will THURSDAY be coded as in the same language?

With the help clues provided in the image, can you find the 5 digit key?

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

What Word am I Looking For ?

It spends most of its day eating white, but when it’s quick enough, it gets to eat fruit and sometimes some blue things. It’s in a dark room, where the walls are blue, it runs from a ghost that roams the halls and haunts it all the time. What is it?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?