complete the grid 5*5 using a number 1*2 rectangles

Question

Can we complete the $5 \times 5$ grid by using $1 \times 2$ rectangles?

Answer 1

How many of the small rectangles would you need?

Answer 2

Adding $1 \times 2$ tiles will only cover an even amount of squares if they are not allowed to overlap. The grid has $25$ tiles which is odd. So no it cannot be done.

To improve the question it is best that you show working. In this case perhaps how many tiles did you lay before coming unstuck?