Spot 5 differences in two Christmas tree below:

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?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

What demands an answer, but asks no questions

Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?

Open a Laptop which is password protected. Hint for the password is given as below:

1 mobile 3 books 2 Boards 1 night 4 balls 2 lighters 1 ghost 1 hat 3 watches

A finger goes in me. You fiddle with me when you're bored. The best man always has me first. What am I?

What makes this number unique: 8,549,176,320?

Can you solve this picture maths equation?

Three brothers Jacob, John, and James live in Mexico City. The product of the ages of these brothers is 175. Jacob and John are twins. How old is James?