Fast Track Multiplication Techniques or Tricks

Tricks 2
When a number (N) is multiplied by 11, 101, 1001, … or (10ⁿ + 1).

In Such a cases, n zero are put at the right end of N to make a new number M and then N is added to this new number to get the result. Clearly, M+N is the result of multiplication.

Example- Multiply 4241 with 101

Solution. Here, N=4241, (10ⁿ +1)=(10² +1)= 101

            According to the rule,

            (N)                   (M)                  (N)

            4241*101=424100+4241

Therefore- (M+N) = 424100 + 4241 = 428341