What is both possible and impossible at the same time?

I’m orange, I wear a green hat and I sound like a parrot. What am I?

You can see three almost identical images below. Can you spot the odd one out from them?

I have an eye but still cannot see.

Who am I?

What does the below mathematical rebus mean?

What you cannot hold but it is yours?

The measurement of time, That can't be found on a clock, But can be looked upon on a map.

Who is He ?

There are three Athletes (John, Tarun and Harish) and their individual Coaches (Jacob, Meenaxi and Priyanka) standing on the shore.
No Coach trusts their Athlete to be near any other Coach unless they are also with them.
There is a boat that can hold a maximum of two persons.
How can the six people get across the river?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

I have two sand hourglasses:
1. A 7 minute one and
2. An 11-minute one.

Using just these 2 sand hourglasses, how can I measure time as 15 minutes?