Mathematics, Data Visualization, Banking.
paid is 0–2=8. So option 1 is the correct answer. To calculate last digit of any product of numbers simply multiply last digits of all numbers. for 9*19*2 multiply 9 by 9 which is 81. Carry forward only last digit i.e 1. Now 1*2= 2. So 2 is the last digit of the above product. Use the same method