Which is the missing pattern?

-0000+, 0-00+0, 00-+00, ............

If 4 × 4 = 8, 5 × 6= 15, 7 × 8 = 28 then 9 × 10 = ..........

If 2 = 0010 and 5 = 0101 then 9 = ........................

If 12 + 8 = 208, 11 + 6 = 157, then 10 + 4 = ....................

What will be xy if 7862 xy is to be divisible by 125?

A person lost 10% when he sold goods at Rs.153. For how much should he sell them to gain 20%?