Which alphabet letter is a question?

Teacher ask the student

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

what did student replied ?

John can eat 27 chocolates in an hour, Jacob can eat 2 chocolates in 10 minutes, and Jolly can eat 7 chocolates in 20 minutes. How long will it take them to share and eat a box of 120 chocolates whilst playing Chess?

Find the smallest sentence with all the English alphabet.

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

A mules travels the same distance daily.
I noticed that two of his legs travels 10km and the remaining two travels 12km.
Obviously two mules legs cannot be a 2km ahead of the other 2.

The mules is perfectly normal. So how come this be true ?

A Man gave one of his sons 10 cents and another son was given 15 cents. What time is it?
Hint: Figure out the relation between time and number, is not so easy..:)

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

ST ND RD TH '?'

Can you Find and name the hidden bird in the picture below ?

A network of 20 x 10 squares is given to you.

Can you calculate how many unique squares and rectangles can be formed combining two or more individual squares ?