How can you write nineteen in a manner that if we take out one, it becomes twenty?

I am a five-letter word and comprises two different vowels and three same consonants. I am so strong that I can spoil your entire work.

Can you find out who am I?

Different lights make me strange by changing me into different sizes. What am I?

What has hands, but can’t clap?

I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

There is a wide field of corn. A goose finds its way into the field and starts running. Can you find out till which point the goose can run into the field?

John is a strange liar.

He lies on six days of the week, but on the seventh day, he always tells the truth.

He made the following statements on three successive days:

Day 1: "I lie on Monday and Tuesday."
Day 2: "Today, it"s Thursday, Saturday, or Sunday."
Day 3: "I lie on Wednesday and Friday."

On which day does John tell the truth?

People make me, save me, change me, raise me. What am I?

In the picture, you can see a chess board. On the top left position, the K marks a knight. Now, can you move the knight in a manner that after 63 moves, the knight has been placed at all the squares exactly once excluding the starting square?