Question

The sum of the digits in unit place of all the numbers formed with the help of 3, 4, 5 and 6 taken all at a time is

Answer 1

24 ways because every single number can be paired with other numbers 6 times and there are 4 numbers so 4×6=24

Answer 2

Answer:108

Step-by-step explanation:

3 unit place 3 3!

4 unit place 4 4!

Same for number 5&6

= (3×6)+(4×6)+(5×6)+(6×6)

=18+24+30+36

=108

Thank you