What does this rebus riddle means ?

You are provided with a grid (as shown in the picture). Can you fill the squares with numbers 1-8 in a manner that none of the two consecutive numbers are placed next to each other in any direction (vertically, horizontally or diagonally?)

If,
29 - 1 = 30
9 - 1 = 10
14 - 1 = 15

Based on similar logic, Can you prove that the below algebraic equation is true?
11 - 1 = 10 ?

Which is the smallest number that you can write using all the vowels exactly once?

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

Give it food and it will live; give it water and it will die.

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

The first person saw the bridge step on it and crossed,
the second person saw the bridge did not step on it but crossed,
the third person did not see the bridge did not step on it but crossed.
Who are these people?

John left on a horse on Thursday , was gone for two days, and came back on Thursday after completing his work. How did that happen?