10 is 2 times larger than 5 because 5*2=10 or 10/5=2.
100 is 4 times larger than 25 because 25*4=100 or 100/25=4
Notice what's in bold. To find out how many times a larger number is compared to a smaller number, divide the larger number by the smaller number. Now, see attachment 1
When you square a number, you chose a number and multiplying itself. If you did the square root of 25, you would get 5. However if you divided 25 by 2, you would get 12.5 which is NOT the square root.