Can you name four days which start with the letter 'T'?

What does this rebus means ?

We can be boring,Or interesting.
We can be long,Or short.
We can have pictures,Or just words.
Many love us,But many also hate us.
What are we?

What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?

I have teeth but i don't bite. Who Am I ?

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

Living above a star, I do not burn
Eleven friends and they do not turn
I can just be visited in a sequence, not once or repeatedly
PQRS are my initials
Can you tell my name accurately?

I am a mother. However, I never give birth.

I am a father. However, I never nurse my children.

Wandering is not possible for me, but standing still happens occurs rarely.

Who am I?

Can you find the odd number in the following?

2716, 4135, 5321 and 7145

A King wants to send the diamond ring to his girlfriend securely. He got multiple locks and their corresponding keys. His girlfriend does not have any keys to these locks and if he sends the key without a lock, the key can be copied in the way. How can King send the ring to his girlfriend securely?