All Years
2000 TYS
Question 8
Question
A ten-digit number is formed by writing down the digits $0,1,2,3,4,5,6,7,8,9$ in some order. No number is allowed to start with $0$. Find how many such numbers are odd.
A ten-digit number is formed by writing down the digits $0,1,2,3,4,5,6,7,8,9$ in some order. No number is allowed to start with $0$. Find how many such numbers are odd.