If A is of order `mxxn` and B is of oredr `pxxq`, then AB is defined only if

If A is of order mxxn , B is of order pxxq such that AB is defined, then:

If A is order mxxn and B is also of order mxxn then (A+B) is a matrix of order ___________.

If A is of order 3 xx 4 and A + B is defined, then what is the order of B?

If A is of order ptimesq and B is of order qtimesr , what is order of AB and BA?

If A is of order 3 × 2 and B is of order 3 × 4 ,then order of (AB)' is _________

If A is of order 3 × 4 and B is of order 4 × 2 ,then order of AB is __________

If A is matrix of order mxxn and B is a matrix such that AB' and B'A are both defined , then order of matrix B is :