MULTIPLICATION OF TWO NUMBERS ENDING WITH 5
For example,
65 x 65
Increase the tens place digit of the first number by one and multiply with the tens place digit of the second number, this will be left part of the answer
(6+1) x 6 = 42
42 – –
Multiply the units place digits of the numbers This will be the right part of the answer
5 x 5=25
4225
65 x 65 = 4225
We take another example,
35 x 35
(3+1) x 3 = 12
5 x 5 =25
35 x 35 = 1225
One more example,
105 x 105
(10+1) x 10 = 110
5 x 5 =25
105 x 105 = 11025
Try these
1. 45 x 45
2. 95 x 95
3. 125 x 125
4. 165 x 165
5. 205 x 205
Now you have a doubt whether this method can be used to multiply any two numbers?
