If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

I go up and I go down.
I go up towards the beautiful sky and down toward the green ground.
I am present tense.
I am past tense too
Children love me.

Who Am I?

As easy as you can get into me, it is as hard to get out of me.

Do you know what I am?

If you read clockwise, you can form a word by inserting three missing letters in the picture given below. Can you do it?

You board a train. The train will have to enter a tunnel soon. You are claustrophobic. Which place is the best for you to sit?

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.

2, 3, 5, 9, 17, _ What is the next number in the sequence?

I am dry when I go inside, but wet when I am pulled outside.
The longer I am inside, the stronger I get
When I am completely out, I am wet and I literally sag
Who am I?

Sherlock breaks into a crime scene. The victim is the owner who is slumped dead on a chair and have a bullet hole in his head. A gun lies on the floor and a cassette recorder is found on the table. On pressing the play button, Sherlock hears the message 'I have committed sins in my life and now I offer my soul to the great Lord' and followed a gunshot Sherlock smiles and informed the police that's its a murder.

Why did he think so?

Identify the 10 differences between the two given pictures.