What is the next number in this matchsticks series riddle?

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?

Who are the happiest people in IPL match?

Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

What have one eye but still cannot see?

Steffi's daughter Jazelle needs to be picked up from school every day.
Steffi asks one of her colleagues to pick up Jazelle from the school. Steffi devised a password system to confirm that Jazelle goes with the correct colleague only.

The password on Monday was SJM16.
The password on Wednesday was TAW39.

What will the password be for Friday?

I don't get anymore wetter, no matter how much rain falls on me.

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

What question can you never answer yes to?

There are seven sisters in a house in a village where there is no electricity or any gadget.

Sister-1: Reading Novel
Sister-2: Cooking
Sister-3: Playing Chess
Sister-4: Playing Sudoku
Sister-5: Washing clothes
Sister-6: Gardening

what is Sister-7 doing ?