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

What happened when the wheel was invented?

He runs but never walks. Murmurs, but never talks. Has a bed, but never sleeps. And has a mouth, but never eats?

Solve The below Equation:

ALFA + BETA + GAMA = DELTA

In a science lab, a petri dish hosts a healthy colony of yeast for an experiment. Now every minute, all the yeast cells divide into two. At noon, there was just a single cell of yeast and at 1:22, the Petri dish was half full. Can you calculate when the dish will be full of yeast?

What is the word or phrase below?
R | E | A | D

A deaf and mute man goes to the train station. Tickets for the train are 50 cents each. The man goes to the ticket booth and hands the man inside just a dollar. The man in the booth hands him two tickets.

How did the man in the booth know to give him two tickets without even looking at him?

What does it mean?

Below rebus represent famous DiCaprio movie. Can you name it?

A cat had three kittens: Snophy, Topsy and Jorden. What was the mother's name?