Squaring Any Number Ending IN 5

• SQUARING ANY NUMBER ENDING IN 5

Rule:   Multiply the complete number to the left of the 5 by one more then itself and affix 25 to the result.

To demonstrate, we shall find the square of 195. The complete number to the left of the 5 is 19. Raising this one number high gives us 20.

                 20 X 19 = 380

To which 25 is affixed.

                 38,025 Answer