Mixed fraction addition and subtraction problems

Maths

As a fraction of a million, how many more people live in Leeds than Hull and Wakefield combined?

In a magic square, every row, column and diagonal have the same total. What should replace the question mark?

The perimeter of this rectangle is 12 m. What is the width (all measurements in metres)?

Which option is the correct answer to this subtraction, written as a mixed number?

Which option is the correct answer to this subtraction?

Which option is the correct answer to this subtraction, written as an improper fraction as simply as possible?