Replace the question mark with the correct number in the below-given picture?

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?

Can you find out the missing number in the grid?

How many minutes are there in Feb 2017?

Note: The shortest answer is the correct answer.

How many triangles are there in the picture below?

What word begins and ends with an E, but has only one letter?

John can fit six large chocolate boxes or nine small chocolate boxes into a carton. How many cartons will he require to put sixty-six chocolate boxes into?

These types of puzzles are known as charades. What you have to do is to find two words that are referred to in the first stanza and the second stanza and put them together to form the third word in the third stanza.

Just for example, if my first refers to 'off' and my second refers to 'ice', then my whole will be the 'office'.

My first is present - future's past -
A time in which your lot is cast.

My second is my first of space
Defining people's present place.

My whole describes a lack of site -
A place without length, breadth, or height.

In the image below, can you find the value of an angle(y)

Can you find a number that lies one third of the distance between 1/3 and 2/3?