If 9999=4 8888=8 1999=3 2222=0 Then 1616=?
HINT:you don't have to be a mathematical genius to solve just observe.............
Consider the following pattern:
8809 = 6 7111 = 0 6666 = 4 7652 = 1 3368 = 3 9313 = 1 1008 = 4 9887 = 5 1155 = 0
What is 2021 = ?