A trick to find the square of numbers ending in 5.

This is my first blog.

Lets go to our topic.

There's a cool idea or trick to find the square ending with number 5.
For example-
45 square=2025
55 square=3025
65 square=4225
95 square=9025
125 square=15625
155 square=24025
so now let me tell about the trick
If you look at the square of every  number do you noticed that there is 25 at last which is a square of 5 and do you noticed that the first two number are the product of the number greater than that.
for your clearance about trick=
6*7=42 and last two digit is always same in the number ending with 5 that is =25 so 4225 is the square of 65.
just like that=
95 square is 9*10=90 and last two digit is always 25 in case of 5 so square of 95 =9025
Hope you understand the trick you can amazed others by telling them that you can square the number ending in 5 even faster than calculator.thats pretty cool.
I will be posting more mathematics blog in future and math questions.

His secret behind being a mathematician