Fast and Furious multiplication

Multiplication of a  number with units digit 5 :-

Fast and Furious method :-


25*25

Step 1) Increase 2 with + 1 so it is 3

Step 2) both tenth digit multiplication is 3*2 = 06

Step 3) unit digit multiplication is 5*5= 25

Step 4 ) Combining step 2 and step 3 = 2506 Ans