The total number of 3-digit numbers, whose greatest common divisor with 36 is 2, is ___________.

There are ten boys B₁, B₂, ......., B₁₀ and five girls G₁, G₂, ........, G₅ in a class. Then the number of ways of forming a group consisting of three boys and three girls, if both B₁ and B₂ together should not be the members of a group, is ___________.

The total number of three-digit numbers, with one digit repeated exactly two times, is ______________.

The number of 3-digit odd numbers, whose sum of digits is a multiple of 7, is _____________.