How many sides does a circle have?

A man started to town with a fox, a goose, and a sack of corn. He came to a stream which he had to cross in a tiny boat. He could only take one across at a time. He could not leave the fox alone with the goose or the goose alone with the corn. How did he get them all safely over the stream?

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

What Word am I Looking For ?

Which Burger Is Different in below image?

Count the number of times the letter "F" appears in the following paragraph:

FAY FRIED FIFTY POUNDS OF
SALTED FISH AND THREE POUNDS
OF DRY FENNEL FOR DINNER FOR
FORTY MEMBERS OF HER FATHER'S FAMILY.

I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?

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?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

One day, John and his friends were playing around. Jacob hit something with a Pin and it popped. John's dad came into the room that very moment, but he wasn't mad. In fact, he was smiling. What did Jacob hit?

What can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?