Quick multiplication special cases:
Case 1:
In a two digit no if the 10th place has same value and the addition of values in unit place is 10 then the multiplication will be like:
Multiply the unit values .
Multiply the 10th value (which is same in both the digit) with 1 incremented value.
Case 2:
In a two digit no if the unit place has same value and the addition of values in 10th place is 10 then the multiplication will be like:
Multiply the unit place values with each other(which are same).
Multiply the 10th values with each other then add them with the unit place value.
Case 3:
If the difference between the two digit is 10. And the unit place contains value 5 then in that particular case the multiplication will be:
Unit place's value is 75(always remain the same because the unit place contains value 5)
Multiply the smaller one 10th place digit with larger digit incremented by 1.
