By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

Out of four images which one is the odd one out?

I am green and found in the forest and have needles instead of leaves. What am I?
Hint 1: It can be used for Christmas decorations.
Hint 2: I have a strong, scent that is used in air fresheners.

You have two strings whose only known property is that when you light one end of either string it takes exactly one hour to burn. The rate at which the strings will burn is completely random and each string is different.

How do you measure 45 minutes?

We have shown you a regular water barrel as below. Without using any measuring device can you check if the barrel is more than half-filled or less than half-filled?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

How can you make number one disappear by adding something to it?

Which is the rope you never skip with?

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

What is the word or phrase?