Teacher ask the student

'Why are you standing on that chair in music class ?'.

what did student replied ?

I know a nine-letter word having only one vowel.
Do you ?

I am a word that begins with the letter “i.” If you add the letter “a” to me, I become a new word with a different meaning, but that sounds exactly the same. What word am I?

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

How many words can a pen with half refill write?

I have an eye but still cannot see.

Who am I?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

Replace all '*' with digits 1, 2, 3, 4, 5 and 6 to make below statement true.

* *
x *
=====
* * *

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height?