I am thinking of a five-digit number such that:
The first and last digits are the same, their submission is an even number and multiplication is an odd number and is equal to the fourth number. Subtract five from it and we obtain the second number. Then divide into exact halves and we get the 3rd number.

What number I am thinking of?

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

Begin with a word, five letters to my name,
Remove the first and last but I am the same
Take out my middle and still, I remain.
What word am I?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

Remove two matchsticks to make the below equation correct.

I make two people out of one. What am I?

How many sides does a circle have?

Count the number of triangles in the given picture.

I look at you, you look at me, I raise my right, you raise your left. What am I?

What is the next number in this series?

4,12,84,3612....