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

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

Two batsman each on 94 runs. Seven runs needed to win in last 3 balls. Both make 100*. How?

Rose, Lily and Jasmine decided to buy flowers for their moms on Mother's Day. One of them bought lilies, the other roses, and the third one jasmines.
'It's funny!' said the girl with roses, 'we bought roses, jasmines and lilies, but none of us bought the flowers matching her name'.
'You're right!', said Lily.
What kind of flowers did each of the girls buy?

What Time Should the last watch show in the below figure?

Complete the series by replacing "?" with the correct number.

ST ND RD TH '?'

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

Using Only Five 5's and any mathematical operator make sum as 37

A train full of passengers goes through a tunnel. When the train comes out from the other end, there is no single person on the train.

How did it happen?