New Concepts in Magic Squares: Cornered Magic Rectangles in Construction of Magic Squares of Orders 20 and 22

This work brings magic squares of orders 20 and 22. These are constructed based on cornered magic rectangles and/or cornered magic squares. Order 20 is with four equal sums cornered magic squares of order 10x10. The order 22 is with four equal sums cornered magic rectangles. It is done with two types centered magic squares of orders 6 and 10. In each case we have 3 different styles.