There are 100 square units
10 x 10 = 100 5 x 20 = 100 4 x 25 = 100 2 x 50 = 100
90 squares.
200
A sixteenth.
10 x 11 = 110
You will need 100 of them, but they are rectangles, not squares.
You can get 12.
The answer depends on the units used for "ten x ten". 10 inch x 10 inch or 10 cm x 10 cm?
1 x 10 yards is the same as 36 x 360 inches, answer = 12960 square inches.
20 squares x 20 squares = 400 squares
3 3/4 squares.
This works out as the sum of the squares of the numbers 1 - 10. There is one 10 x 10 square, four 9 x 9, nine 8 x 8 and so on up to one hundred 1 x 1. 1 + 4 + 9 + 16 + 25 + 36 + 49 + 64 + 81 + 100 = 385.