What can you see in the middle of March and April that you can never see in any other month?

Spot 5 differences in two Christmas tree below:

I come in different shapes and sizes.
Parts of me are curved, other parts are straight.
You can put me anywhere you like,
but there is only one right place for me.
What am I?

Which alphabet is a part of our body?

What does this rebus means ?

PROG WORKRESS

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

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?

What number when divided in half becomes zero?

A bank customer had $100 in his account. He then made 6 withdrawals. He kept a record of these withdrawals, and the balance remaining in the account, as follows:

Withdrawals Balance left
$50 $50
$25 $25
$10 $15
$8 $7
$5 $2
$2 $0
----- -----
$100 $99

Why are the Totals not tallying?

What can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?