Two digit multiplication in 2 seconds

Ex : 33 x 37

This is very easy. Matter of seconds to complete the multiplication

33 x 37 = 3 x 4 / 7 x 3
             = 12 / 21
             = 1221

Please remember this is special case

You can apply this method if it satisfies two conditions

1. ten's digit should be same

2. sum of 1's digits should be 10

In 33 x 37

10's digit is 3 in both number
sum of 1's digit = 3 + 7 = 10

Let  us try one more example

42 x 48 = 20 / 16 = 2016

What exactly you are doing is

1's digit number in the result = product of 1's digit = 2 x 8 = 16

10's digit number in the result = 10's digit number x (10's digit number  + 1)

                                               = 4 x ( 4 + 1) = 4 x 5 = 20

No carry forward. Just you are taking numbers as it is
i.e result = 2016

Try following examples  and check the result

Ex 1.   51 x 59 = ?
           23 x 27 = ?
           94 x 96 = ?
           76 x 74 = ?