By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

Can you move 2 matchsticks to form four equal sized squares.

Replace the question mark with the correct number in below Picture:

Today is John's birthday.
A year ago, John had five candles and he lit all the candles except the one at the last.
Now he is going to light all the candles.

How old is John Today?

(He is not five today.....)

Replace the question mark with the number below given a simple math problem.

When I asked a girl's name she told me her name is the date '07/09/2001'.

I thought for a few seconds and then I got her name. Do you?

Most people think of me as money. But when they find me in the water, they won’t get any money out of me. What am I?

What goes up but never comes down?

How many minutes are there in Feb 2017?

Note: The shortest answer is the correct answer.

A gardener planted the Lemon trees in a mathematical ordered way (i.e. he planted a tree in rows).
He created a total of 19 rows of trees.

Note: There should be more than 2 trees to count as a row.

What is the minimum number of trees required by the gardener to have 19 rows of trees?