Factorise Fully

Question 1:

6e+30
6 e+5

Question 2:

72t+63
9 8t+7

Question 3:

40p+48
8 5p+6

Question 4:

9x2+8x
x 9x+8

Question 5:

6kq+5k
k 6q+5

Question 6:

16r272pr
8r 2r9p