I have teeth but i don't bite. Who Am I ?

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?

What can you hold in your right hand, but never in your left hand?

In particular commonwealth games, a female participant won silver and gold medals for a single event.

How can this be possible?

What does the below image rebus riddle means ?

Give it food and it will live; give it water and it will die.

Rearrange the letters in "new door" to make one word.

I make two people out of one. What am I?

A mathematics teacher took exams for his students. Out of the total students, 25% passed both the tests included in the exam. However, only 42% were able to clear the first test.

Can you find out the percentage of those students who passed the first test and also passed the second test?

I go up and I go down.
I go up towards the beautiful sky and down toward the green ground.
I am present tense.
I am past tense too
Children love me.

Who Am I?