Complete the table series riddle by finding the number that can replace "??".

Your last good ping-pong ball fell into a narrow metal pipe embedded one foot deep in concrete.
How can you get it out undamaged, if all the tools you have are your tennis paddle, shoe laces, and plastic water bottle, which does not fit into the pipe?

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

Decode the below four famous ciphers:

8P of the SS
1M of the E
1S of the SS
60M in 1H

On a bus, there is a 26-year-old pregnant lady.
A 30-year-old policeman.
A 52-year-old random woman.
And the 65-year-old driver.

Who is the youngest?

A Child was born in Lahore, Pakistan.

Still child is not a Pakistani citizen.why ?

Which country gets ill every time?

A worker is to perform work for you for seven straight days. In return for his work, you will pay him 1/7th of a bar of gold per day. The worker requires a daily payment of 1/7th of the bar of gold. What and where are the fewest number of cuts to the bar of gold that will allow you to pay him 1/7th each day?

This puzzle is for Harry Potter fans. Do you know why Tom Riddle is called Lord Voldemort?

10+10 and 11+11 can give you the same answer.

Explain how?